diff options
Diffstat (limited to 'tmk_core/protocol/arm_atsam/clks.c')
-rw-r--r-- | tmk_core/protocol/arm_atsam/clks.c | 375 |
1 files changed, 210 insertions, 165 deletions
diff --git a/tmk_core/protocol/arm_atsam/clks.c b/tmk_core/protocol/arm_atsam/clks.c index 1ff318e59b..84ed6d83af 100644 --- a/tmk_core/protocol/arm_atsam/clks.c +++ b/tmk_core/protocol/arm_atsam/clks.c @@ -19,83 +19,105 @@ along with this program. If not, see <http://www.gnu.org/licenses/>. #include <string.h> -volatile clk_t system_clks; +volatile clk_t system_clks; volatile uint64_t ms_clk; -uint32_t usec_delay_mult; -#define USEC_DELAY_LOOP_CYCLES 3 //Sum of instruction cycles in us delay loop +uint32_t usec_delay_mult; +#define USEC_DELAY_LOOP_CYCLES 3 // Sum of instruction cycles in us delay loop -const uint32_t sercom_apbbase[] = {(uint32_t)SERCOM0,(uint32_t)SERCOM1,(uint32_t)SERCOM2,(uint32_t)SERCOM3,(uint32_t)SERCOM4,(uint32_t)SERCOM5}; -const uint8_t sercom_pchan[] = {7, 8, 23, 24, 34, 35}; +const uint32_t sercom_apbbase[] = {(uint32_t)SERCOM0, (uint32_t)SERCOM1, (uint32_t)SERCOM2, (uint32_t)SERCOM3, (uint32_t)SERCOM4, (uint32_t)SERCOM5}; +const uint8_t sercom_pchan[] = {7, 8, 23, 24, 34, 35}; -#define USE_DPLL_IND 0 -#define USE_DPLL_DEF GCLK_SOURCE_DPLL0 +#define USE_DPLL_IND 0 +#define USE_DPLL_DEF GCLK_SOURCE_DPLL0 -void CLK_oscctrl_init(void) -{ +void CLK_oscctrl_init(void) { Oscctrl *posctrl = OSCCTRL; - Gclk *pgclk = GCLK; + Gclk * pgclk = GCLK; DBGC(DC_CLK_OSC_INIT_BEGIN); - //default setup on por - system_clks.freq_dfll = FREQ_DFLL_DEFAULT; + // default setup on por + system_clks.freq_dfll = FREQ_DFLL_DEFAULT; system_clks.freq_gclk[0] = system_clks.freq_dfll; - //configure and startup 16MHz xosc0 - posctrl->XOSCCTRL[0].bit.ENABLE = 0; - posctrl->XOSCCTRL[0].bit.STARTUP = 0xD; - posctrl->XOSCCTRL[0].bit.ENALC = 1; - posctrl->XOSCCTRL[0].bit.IMULT = 5; - posctrl->XOSCCTRL[0].bit.IPTAT = 3; + // configure and startup 16MHz xosc0 + posctrl->XOSCCTRL[0].bit.ENABLE = 0; + posctrl->XOSCCTRL[0].bit.STARTUP = 0xD; + posctrl->XOSCCTRL[0].bit.ENALC = 1; + posctrl->XOSCCTRL[0].bit.IMULT = 5; + posctrl->XOSCCTRL[0].bit.IPTAT = 3; posctrl->XOSCCTRL[0].bit.ONDEMAND = 0; - posctrl->XOSCCTRL[0].bit.XTALEN = 1; - posctrl->XOSCCTRL[0].bit.ENABLE = 1; - while (posctrl->STATUS.bit.XOSCRDY0 == 0) { DBGC(DC_CLK_OSC_INIT_XOSC0_SYNC); } + posctrl->XOSCCTRL[0].bit.XTALEN = 1; + posctrl->XOSCCTRL[0].bit.ENABLE = 1; + while (posctrl->STATUS.bit.XOSCRDY0 == 0) { + DBGC(DC_CLK_OSC_INIT_XOSC0_SYNC); + } system_clks.freq_xosc0 = FREQ_XOSC0; - //configure and startup DPLL + // configure and startup DPLL posctrl->Dpll[USE_DPLL_IND].DPLLCTRLA.bit.ENABLE = 0; - while (posctrl->Dpll[USE_DPLL_IND].DPLLSYNCBUSY.bit.ENABLE) { DBGC(DC_CLK_OSC_INIT_DPLL_SYNC_DISABLE); } - posctrl->Dpll[USE_DPLL_IND].DPLLCTRLB.bit.REFCLK = 2; //select XOSC0 (16MHz) - posctrl->Dpll[USE_DPLL_IND].DPLLCTRLB.bit.DIV = 7; //16 MHz / (2 * (7 + 1)) = 1 MHz - posctrl->Dpll[USE_DPLL_IND].DPLLRATIO.bit.LDR = PLL_RATIO; //1 MHz * (PLL_RATIO(47) + 1) = 48MHz - while (posctrl->Dpll[USE_DPLL_IND].DPLLSYNCBUSY.bit.DPLLRATIO) { DBGC(DC_CLK_OSC_INIT_DPLL_SYNC_RATIO); } + while (posctrl->Dpll[USE_DPLL_IND].DPLLSYNCBUSY.bit.ENABLE) { + DBGC(DC_CLK_OSC_INIT_DPLL_SYNC_DISABLE); + } + posctrl->Dpll[USE_DPLL_IND].DPLLCTRLB.bit.REFCLK = 2; // select XOSC0 (16MHz) + posctrl->Dpll[USE_DPLL_IND].DPLLCTRLB.bit.DIV = 7; // 16 MHz / (2 * (7 + 1)) = 1 MHz + posctrl->Dpll[USE_DPLL_IND].DPLLRATIO.bit.LDR = PLL_RATIO; // 1 MHz * (PLL_RATIO(47) + 1) = 48MHz + while (posctrl->Dpll[USE_DPLL_IND].DPLLSYNCBUSY.bit.DPLLRATIO) { + DBGC(DC_CLK_OSC_INIT_DPLL_SYNC_RATIO); + } posctrl->Dpll[USE_DPLL_IND].DPLLCTRLA.bit.ONDEMAND = 0; - posctrl->Dpll[USE_DPLL_IND].DPLLCTRLA.bit.ENABLE = 1; - while (posctrl->Dpll[USE_DPLL_IND].DPLLSYNCBUSY.bit.ENABLE) { DBGC(DC_CLK_OSC_INIT_DPLL_SYNC_ENABLE); } - while (posctrl->Dpll[USE_DPLL_IND].DPLLSTATUS.bit.LOCK == 0) { DBGC(DC_CLK_OSC_INIT_DPLL_WAIT_LOCK); } - while (posctrl->Dpll[USE_DPLL_IND].DPLLSTATUS.bit.CLKRDY == 0) { DBGC(DC_CLK_OSC_INIT_DPLL_WAIT_CLKRDY); } + posctrl->Dpll[USE_DPLL_IND].DPLLCTRLA.bit.ENABLE = 1; + while (posctrl->Dpll[USE_DPLL_IND].DPLLSYNCBUSY.bit.ENABLE) { + DBGC(DC_CLK_OSC_INIT_DPLL_SYNC_ENABLE); + } + while (posctrl->Dpll[USE_DPLL_IND].DPLLSTATUS.bit.LOCK == 0) { + DBGC(DC_CLK_OSC_INIT_DPLL_WAIT_LOCK); + } + while (posctrl->Dpll[USE_DPLL_IND].DPLLSTATUS.bit.CLKRDY == 0) { + DBGC(DC_CLK_OSC_INIT_DPLL_WAIT_CLKRDY); + } system_clks.freq_dpll[0] = (system_clks.freq_xosc0 / 2 / (posctrl->Dpll[USE_DPLL_IND].DPLLCTRLB.bit.DIV + 1)) * (posctrl->Dpll[USE_DPLL_IND].DPLLRATIO.bit.LDR + 1); - //change gclk0 to DPLL + // change gclk0 to DPLL pgclk->GENCTRL[GEN_DPLL0].bit.SRC = USE_DPLL_DEF; - while (pgclk->SYNCBUSY.bit.GENCTRL0) { DBGC(DC_CLK_OSC_INIT_GCLK_SYNC_GENCTRL0); } + while (pgclk->SYNCBUSY.bit.GENCTRL0) { + DBGC(DC_CLK_OSC_INIT_GCLK_SYNC_GENCTRL0); + } system_clks.freq_gclk[0] = system_clks.freq_dpll[0]; usec_delay_mult = system_clks.freq_gclk[0] / (USEC_DELAY_LOOP_CYCLES * 1000000); - if (usec_delay_mult < 1) usec_delay_mult = 1; //Never allow a multiplier of zero + if (usec_delay_mult < 1) usec_delay_mult = 1; // Never allow a multiplier of zero DBGC(DC_CLK_OSC_INIT_COMPLETE); } -//configure for 1MHz (1 usec timebase) -//call CLK_set_gclk_freq(GEN_TC45, FREQ_TC45_DEFAULT); -uint32_t CLK_set_gclk_freq(uint8_t gclkn, uint32_t freq) -{ +// configure for 1MHz (1 usec timebase) +// call CLK_set_gclk_freq(GEN_TC45, FREQ_TC45_DEFAULT); +uint32_t CLK_set_gclk_freq(uint8_t gclkn, uint32_t freq) { Gclk *pgclk = GCLK; DBGC(DC_CLK_SET_GCLK_FREQ_BEGIN); - while (pgclk->SYNCBUSY.vec.GENCTRL) { DBGC(DC_CLK_SET_GCLK_FREQ_SYNC_1); } + while (pgclk->SYNCBUSY.vec.GENCTRL) { + DBGC(DC_CLK_SET_GCLK_FREQ_SYNC_1); + } pgclk->GENCTRL[gclkn].bit.SRC = USE_DPLL_DEF; - while (pgclk->SYNCBUSY.vec.GENCTRL) { DBGC(DC_CLK_SET_GCLK_FREQ_SYNC_2); } + while (pgclk->SYNCBUSY.vec.GENCTRL) { + DBGC(DC_CLK_SET_GCLK_FREQ_SYNC_2); + } pgclk->GENCTRL[gclkn].bit.DIV = (uint8_t)(system_clks.freq_dpll[0] / freq); - while (pgclk->SYNCBUSY.vec.GENCTRL) { DBGC(DC_CLK_SET_GCLK_FREQ_SYNC_3); } + while (pgclk->SYNCBUSY.vec.GENCTRL) { + DBGC(DC_CLK_SET_GCLK_FREQ_SYNC_3); + } pgclk->GENCTRL[gclkn].bit.DIVSEL = 0; - while (pgclk->SYNCBUSY.vec.GENCTRL) { DBGC(DC_CLK_SET_GCLK_FREQ_SYNC_4); } + while (pgclk->SYNCBUSY.vec.GENCTRL) { + DBGC(DC_CLK_SET_GCLK_FREQ_SYNC_4); + } pgclk->GENCTRL[gclkn].bit.GENEN = 1; - while (pgclk->SYNCBUSY.vec.GENCTRL) { DBGC(DC_CLK_SET_GCLK_FREQ_SYNC_5); } + while (pgclk->SYNCBUSY.vec.GENCTRL) { + DBGC(DC_CLK_SET_GCLK_FREQ_SYNC_5); + } system_clks.freq_gclk[gclkn] = system_clks.freq_dpll[0] / pgclk->GENCTRL[gclkn].bit.DIV; DBGC(DC_CLK_SET_GCLK_FREQ_COMPLETE); @@ -103,29 +125,37 @@ uint32_t CLK_set_gclk_freq(uint8_t gclkn, uint32_t freq) return system_clks.freq_gclk[gclkn]; } -void CLK_init_osc(void) -{ +void CLK_init_osc(void) { uint8_t gclkn = GEN_OSC0; - Gclk *pgclk = GCLK; + Gclk * pgclk = GCLK; DBGC(DC_CLK_INIT_OSC_BEGIN); - while (pgclk->SYNCBUSY.vec.GENCTRL) { DBGC(DC_CLK_INIT_OSC_SYNC_1); } + while (pgclk->SYNCBUSY.vec.GENCTRL) { + DBGC(DC_CLK_INIT_OSC_SYNC_1); + } pgclk->GENCTRL[gclkn].bit.SRC = GCLK_SOURCE_XOSC0; - while (pgclk->SYNCBUSY.vec.GENCTRL) { DBGC(DC_CLK_INIT_OSC_SYNC_2); } + while (pgclk->SYNCBUSY.vec.GENCTRL) { + DBGC(DC_CLK_INIT_OSC_SYNC_2); + } pgclk->GENCTRL[gclkn].bit.DIV = 1; - while (pgclk->SYNCBUSY.vec.GENCTRL) { DBGC(DC_CLK_INIT_OSC_SYNC_3); } + while (pgclk->SYNCBUSY.vec.GENCTRL) { + DBGC(DC_CLK_INIT_OSC_SYNC_3); + } pgclk->GENCTRL[gclkn].bit.DIVSEL = 0; - while (pgclk->SYNCBUSY.vec.GENCTRL) { DBGC(DC_CLK_INIT_OSC_SYNC_4); } + while (pgclk->SYNCBUSY.vec.GENCTRL) { + DBGC(DC_CLK_INIT_OSC_SYNC_4); + } pgclk->GENCTRL[gclkn].bit.GENEN = 1; - while (pgclk->SYNCBUSY.vec.GENCTRL) { DBGC(DC_CLK_INIT_OSC_SYNC_5); } + while (pgclk->SYNCBUSY.vec.GENCTRL) { + DBGC(DC_CLK_INIT_OSC_SYNC_5); + } system_clks.freq_gclk[gclkn] = system_clks.freq_xosc0; DBGC(DC_CLK_INIT_OSC_COMPLETE); } -void CLK_reset_time(void) -{ +void CLK_reset_time(void) { Tc *ptc4 = TC4; Tc *ptc0 = TC0; @@ -133,72 +163,85 @@ void CLK_reset_time(void) DBGC(DC_CLK_RESET_TIME_BEGIN); - //stop counters + // stop counters ptc4->COUNT16.CTRLA.bit.ENABLE = 0; - while (ptc4->COUNT16.SYNCBUSY.bit.ENABLE) {} + while (ptc4->COUNT16.SYNCBUSY.bit.ENABLE) { + } ptc0->COUNT32.CTRLA.bit.ENABLE = 0; - while (ptc0->COUNT32.SYNCBUSY.bit.ENABLE) {} - //zero counters + while (ptc0->COUNT32.SYNCBUSY.bit.ENABLE) { + } + // zero counters ptc4->COUNT16.COUNT.reg = 0; - while (ptc4->COUNT16.SYNCBUSY.bit.COUNT) {} + while (ptc4->COUNT16.SYNCBUSY.bit.COUNT) { + } ptc0->COUNT32.COUNT.reg = 0; - while (ptc0->COUNT32.SYNCBUSY.bit.COUNT) {} - //start counters + while (ptc0->COUNT32.SYNCBUSY.bit.COUNT) { + } + // start counters ptc0->COUNT32.CTRLA.bit.ENABLE = 1; - while (ptc0->COUNT32.SYNCBUSY.bit.ENABLE) {} + while (ptc0->COUNT32.SYNCBUSY.bit.ENABLE) { + } ptc4->COUNT16.CTRLA.bit.ENABLE = 1; - while (ptc4->COUNT16.SYNCBUSY.bit.ENABLE) {} + while (ptc4->COUNT16.SYNCBUSY.bit.ENABLE) { + } DBGC(DC_CLK_RESET_TIME_COMPLETE); } -void TC4_Handler() -{ - if (TC4->COUNT16.INTFLAG.bit.MC0) - { +void TC4_Handler() { + if (TC4->COUNT16.INTFLAG.bit.MC0) { TC4->COUNT16.INTFLAG.reg = TC_INTENCLR_MC0; ms_clk++; } } -uint32_t CLK_enable_timebase(void) -{ - Gclk *pgclk = GCLK; - Mclk *pmclk = MCLK; - Tc *ptc4 = TC4; - Tc *ptc0 = TC0; +uint32_t CLK_enable_timebase(void) { + Gclk * pgclk = GCLK; + Mclk * pmclk = MCLK; + Tc * ptc4 = TC4; + Tc * ptc0 = TC0; Evsys *pevsys = EVSYS; DBGC(DC_CLK_ENABLE_TIMEBASE_BEGIN); - //gclk2 highspeed time base + // gclk2 highspeed time base CLK_set_gclk_freq(GEN_TC45, FREQ_TC45_DEFAULT); CLK_init_osc(); - //unmask TC4, sourcegclk2 to TC4 - pmclk->APBCMASK.bit.TC4_ = 1; - pgclk->PCHCTRL[TC4_GCLK_ID].bit.GEN = GEN_TC45; + // unmask TC4, sourcegclk2 to TC4 + pmclk->APBCMASK.bit.TC4_ = 1; + pgclk->PCHCTRL[TC4_GCLK_ID].bit.GEN = GEN_TC45; pgclk->PCHCTRL[TC4_GCLK_ID].bit.CHEN = 1; - //configure TC4 + // configure TC4 DBGC(DC_CLK_ENABLE_TIMEBASE_TC4_BEGIN); ptc4->COUNT16.CTRLA.bit.ENABLE = 0; - while (ptc4->COUNT16.SYNCBUSY.bit.ENABLE) { DBGC(DC_CLK_ENABLE_TIMEBASE_TC4_SYNC_DISABLE); } + while (ptc4->COUNT16.SYNCBUSY.bit.ENABLE) { + DBGC(DC_CLK_ENABLE_TIMEBASE_TC4_SYNC_DISABLE); + } ptc4->COUNT16.CTRLA.bit.SWRST = 1; - while (ptc4->COUNT16.SYNCBUSY.bit.SWRST) { DBGC(DC_CLK_ENABLE_TIMEBASE_TC4_SYNC_SWRST_1); } - while (ptc4->COUNT16.CTRLA.bit.SWRST) { DBGC(DC_CLK_ENABLE_TIMEBASE_TC4_SYNC_SWRST_2); } + while (ptc4->COUNT16.SYNCBUSY.bit.SWRST) { + DBGC(DC_CLK_ENABLE_TIMEBASE_TC4_SYNC_SWRST_1); + } + while (ptc4->COUNT16.CTRLA.bit.SWRST) { + DBGC(DC_CLK_ENABLE_TIMEBASE_TC4_SYNC_SWRST_2); + } - //CTRLA defaults - //CTRLB as default, counting up + // CTRLA defaults + // CTRLB as default, counting up ptc4->COUNT16.CTRLBCLR.reg = 5; - while (ptc4->COUNT16.SYNCBUSY.bit.CTRLB) { DBGC(DC_CLK_ENABLE_TIMEBASE_TC4_SYNC_CLTRB); } + while (ptc4->COUNT16.SYNCBUSY.bit.CTRLB) { + DBGC(DC_CLK_ENABLE_TIMEBASE_TC4_SYNC_CLTRB); + } ptc4->COUNT16.CC[0].reg = 999; - while (ptc4->COUNT16.SYNCBUSY.bit.CC0) { DBGC(DC_CLK_ENABLE_TIMEBASE_TC4_SYNC_CC0); } - //ptc4->COUNT16.DBGCTRL.bit.DBGRUN = 1; + while (ptc4->COUNT16.SYNCBUSY.bit.CC0) { + DBGC(DC_CLK_ENABLE_TIMEBASE_TC4_SYNC_CC0); + } + // ptc4->COUNT16.DBGCTRL.bit.DBGRUN = 1; - //wave mode - ptc4->COUNT16.WAVE.bit.WAVEGEN = 1; //MFRQ match frequency mode, toggle each CC match - //generate event for next stage + // wave mode + ptc4->COUNT16.WAVE.bit.WAVEGEN = 1; // MFRQ match frequency mode, toggle each CC match + // generate event for next stage ptc4->COUNT16.EVCTRL.bit.MCEO0 = 1; NVIC_EnableIRQ(TC4_IRQn); @@ -206,39 +249,45 @@ uint32_t CLK_enable_timebase(void) DBGC(DC_CLK_ENABLE_TIMEBASE_TC4_COMPLETE); - //unmask TC0,1, sourcegclk2 to TC0,1 - pmclk->APBAMASK.bit.TC0_ = 1; - pgclk->PCHCTRL[TC0_GCLK_ID].bit.GEN = GEN_TC45; + // unmask TC0,1, sourcegclk2 to TC0,1 + pmclk->APBAMASK.bit.TC0_ = 1; + pgclk->PCHCTRL[TC0_GCLK_ID].bit.GEN = GEN_TC45; pgclk->PCHCTRL[TC0_GCLK_ID].bit.CHEN = 1; - pmclk->APBAMASK.bit.TC1_ = 1; - pgclk->PCHCTRL[TC1_GCLK_ID].bit.GEN = GEN_TC45; + pmclk->APBAMASK.bit.TC1_ = 1; + pgclk->PCHCTRL[TC1_GCLK_ID].bit.GEN = GEN_TC45; pgclk->PCHCTRL[TC1_GCLK_ID].bit.CHEN = 1; - //configure TC0 + // configure TC0 DBGC(DC_CLK_ENABLE_TIMEBASE_TC0_BEGIN); ptc0->COUNT32.CTRLA.bit.ENABLE = 0; - while (ptc0->COUNT32.SYNCBUSY.bit.ENABLE) { DBGC(DC_CLK_ENABLE_TIMEBASE_TC0_SYNC_DISABLE); } + while (ptc0->COUNT32.SYNCBUSY.bit.ENABLE) { + DBGC(DC_CLK_ENABLE_TIMEBASE_TC0_SYNC_DISABLE); + } ptc0->COUNT32.CTRLA.bit.SWRST = 1; - while (ptc0->COUNT32.SYNCBUSY.bit.SWRST) { DBGC(DC_CLK_ENABLE_TIMEBASE_TC0_SYNC_SWRST_1); } - while (ptc0->COUNT32.CTRLA.bit.SWRST) { DBGC(DC_CLK_ENABLE_TIMEBASE_TC0_SYNC_SWRST_2); } - //CTRLA as default - ptc0->COUNT32.CTRLA.bit.MODE = 2; //32 bit mode - ptc0->COUNT32.EVCTRL.bit.TCEI = 1; //enable incoming events - ptc0->COUNT32.EVCTRL.bit.EVACT = 2 ; //count events + while (ptc0->COUNT32.SYNCBUSY.bit.SWRST) { + DBGC(DC_CLK_ENABLE_TIMEBASE_TC0_SYNC_SWRST_1); + } + while (ptc0->COUNT32.CTRLA.bit.SWRST) { + DBGC(DC_CLK_ENABLE_TIMEBASE_TC0_SYNC_SWRST_2); + } + // CTRLA as default + ptc0->COUNT32.CTRLA.bit.MODE = 2; // 32 bit mode + ptc0->COUNT32.EVCTRL.bit.TCEI = 1; // enable incoming events + ptc0->COUNT32.EVCTRL.bit.EVACT = 2; // count events DBGC(DC_CLK_ENABLE_TIMEBASE_TC0_COMPLETE); DBGC(DC_CLK_ENABLE_TIMEBASE_EVSYS_BEGIN); - //configure event system - pmclk->APBBMASK.bit.EVSYS_ = 1; - pgclk->PCHCTRL[EVSYS_GCLK_ID_0].bit.GEN = GEN_TC45; + // configure event system + pmclk->APBBMASK.bit.EVSYS_ = 1; + pgclk->PCHCTRL[EVSYS_GCLK_ID_0].bit.GEN = GEN_TC45; pgclk->PCHCTRL[EVSYS_GCLK_ID_0].bit.CHEN = 1; - pevsys->USER[44].reg = EVSYS_ID_USER_PORT_EV_0; //TC0 will get event channel 0 - pevsys->Channel[0].CHANNEL.bit.EDGSEL = EVSYS_CHANNEL_EDGSEL_RISING_EDGE_Val; //Rising edge - pevsys->Channel[0].CHANNEL.bit.PATH = EVSYS_CHANNEL_PATH_SYNCHRONOUS_Val; //Synchronous - pevsys->Channel[0].CHANNEL.bit.EVGEN = EVSYS_ID_GEN_TC4_MCX_0; //TC4 MC0 + pevsys->USER[44].reg = EVSYS_ID_USER_PORT_EV_0; // TC0 will get event channel 0 + pevsys->Channel[0].CHANNEL.bit.EDGSEL = EVSYS_CHANNEL_EDGSEL_RISING_EDGE_Val; // Rising edge + pevsys->Channel[0].CHANNEL.bit.PATH = EVSYS_CHANNEL_PATH_SYNCHRONOUS_Val; // Synchronous + pevsys->Channel[0].CHANNEL.bit.EVGEN = EVSYS_ID_GEN_TC4_MCX_0; // TC4 MC0 DBGC(DC_CLK_ENABLE_TIMEBASE_EVSYS_COMPLETE); @@ -251,34 +300,29 @@ uint32_t CLK_enable_timebase(void) return 0; } -void CLK_delay_us(uint32_t usec) -{ - asm ( - "CBZ R0, return\n\t" //If usec == 0, branch to return label +void CLK_delay_us(uint32_t usec) { + asm("CBZ R0, return\n\t" // If usec == 0, branch to return label ); - asm ( - "MULS R0, %0\n\t" //Multiply R0(usec) by usec_delay_mult and store in R0 - ".balign 16\n\t" //Ensure loop is aligned for fastest performance - "loop: SUBS R0, #1\n\t" //Subtract 1 from R0 and update flags (1 cycle) - "BNE loop\n\t" //Branch if non-zero to loop label (2 cycles) NOTE: USEC_DELAY_LOOP_CYCLES is the sum of loop cycles - "return:\n\t" //Return label - : //No output registers - : "r" (usec_delay_mult) //For %0 + asm("MULS R0, %0\n\t" // Multiply R0(usec) by usec_delay_mult and store in R0 + ".balign 16\n\t" // Ensure loop is aligned for fastest performance + "loop: SUBS R0, #1\n\t" // Subtract 1 from R0 and update flags (1 cycle) + "BNE loop\n\t" // Branch if non-zero to loop label (2 cycles) NOTE: USEC_DELAY_LOOP_CYCLES is the sum of loop cycles + "return:\n\t" // Return label + : // No output registers + : "r"(usec_delay_mult) // For %0 ); - //Note: BX LR generated + // Note: BX LR generated } -void CLK_delay_ms(uint64_t msec) -{ +void CLK_delay_ms(uint64_t msec) { msec += timer_read64(); - while (msec > timer_read64()) {} + while (msec > timer_read64()) { + } } -void clk_enable_sercom_apbmask(int sercomn) -{ +void clk_enable_sercom_apbmask(int sercomn) { Mclk *pmclk = MCLK; - switch (sercomn) - { + switch (sercomn) { case 0: pmclk->APBAMASK.bit.SERCOM0_ = 1; break; @@ -296,26 +340,27 @@ void clk_enable_sercom_apbmask(int sercomn) } } -//call CLK_oscctrl_init first -//call CLK_set_spi_freq(CHAN_SERCOM_SPI, FREQ_SPI_DEFAULT); -uint32_t CLK_set_spi_freq(uint8_t sercomn, uint32_t freq) -{ +// call CLK_oscctrl_init first +// call CLK_set_spi_freq(CHAN_SERCOM_SPI, FREQ_SPI_DEFAULT); +uint32_t CLK_set_spi_freq(uint8_t sercomn, uint32_t freq) { DBGC(DC_CLK_SET_SPI_FREQ_BEGIN); - Gclk *pgclk = GCLK; + Gclk * pgclk = GCLK; Sercom *psercom = (Sercom *)sercom_apbbase[sercomn]; clk_enable_sercom_apbmask(sercomn); - //all gclk0 for now - pgclk->PCHCTRL[sercom_pchan[sercomn]].bit.GEN = 0; + // all gclk0 for now + pgclk->PCHCTRL[sercom_pchan[sercomn]].bit.GEN = 0; pgclk->PCHCTRL[sercom_pchan[sercomn]].bit.CHEN = 1; psercom->I2CM.CTRLA.bit.SWRST = 1; - while (psercom->I2CM.SYNCBUSY.bit.SWRST) {} - while (psercom->I2CM.CTRLA.bit.SWRST) {} + while (psercom->I2CM.SYNCBUSY.bit.SWRST) { + } + while (psercom->I2CM.CTRLA.bit.SWRST) { + } - psercom->SPI.BAUD.reg = (uint8_t) (system_clks.freq_gclk[0]/2/freq-1); - system_clks.freq_spi = system_clks.freq_gclk[0]/2/(psercom->SPI.BAUD.reg+1); + psercom->SPI.BAUD.reg = (uint8_t)(system_clks.freq_gclk[0] / 2 / freq - 1); + system_clks.freq_spi = system_clks.freq_gclk[0] / 2 / (psercom->SPI.BAUD.reg + 1); system_clks.freq_sercom[sercomn] = system_clks.freq_spi; DBGC(DC_CLK_SET_SPI_FREQ_COMPLETE); @@ -323,26 +368,27 @@ uint32_t CLK_set_spi_freq(uint8_t sercomn, uint32_t freq) return system_clks.freq_spi; } -//call CLK_oscctrl_init first -//call CLK_set_i2c0_freq(CHAN_SERCOM_I2C0, FREQ_I2C0_DEFAULT); -uint32_t CLK_set_i2c0_freq(uint8_t sercomn, uint32_t freq) -{ +// call CLK_oscctrl_init first +// call CLK_set_i2c0_freq(CHAN_SERCOM_I2C0, FREQ_I2C0_DEFAULT); +uint32_t CLK_set_i2c0_freq(uint8_t sercomn, uint32_t freq) { DBGC(DC_CLK_SET_I2C0_FREQ_BEGIN); - Gclk *pgclk = GCLK; + Gclk * pgclk = GCLK; Sercom *psercom = (Sercom *)sercom_apbbase[sercomn]; clk_enable_sercom_apbmask(sercomn); - //all gclk0 for now - pgclk->PCHCTRL[sercom_pchan[sercomn]].bit.GEN = 0; + // all gclk0 for now + pgclk->PCHCTRL[sercom_pchan[sercomn]].bit.GEN = 0; pgclk->PCHCTRL[sercom_pchan[sercomn]].bit.CHEN = 1; psercom->I2CM.CTRLA.bit.SWRST = 1; - while (psercom->I2CM.SYNCBUSY.bit.SWRST) {} - while (psercom->I2CM.CTRLA.bit.SWRST) {} + while (psercom->I2CM.SYNCBUSY.bit.SWRST) { + } + while (psercom->I2CM.CTRLA.bit.SWRST) { + } - psercom->I2CM.BAUD.bit.BAUD = (uint8_t) (system_clks.freq_gclk[0]/2/freq-1); - system_clks.freq_i2c0 = system_clks.freq_gclk[0]/2/(psercom->I2CM.BAUD.bit.BAUD+1); + psercom->I2CM.BAUD.bit.BAUD = (uint8_t)(system_clks.freq_gclk[0] / 2 / freq - 1); + system_clks.freq_i2c0 = system_clks.freq_gclk[0] / 2 / (psercom->I2CM.BAUD.bit.BAUD + 1); system_clks.freq_sercom[sercomn] = system_clks.freq_i2c0; DBGC(DC_CLK_SET_I2C0_FREQ_COMPLETE); @@ -350,26 +396,27 @@ uint32_t CLK_set_i2c0_freq(uint8_t sercomn, uint32_t freq) return system_clks.freq_i2c0; } -//call CLK_oscctrl_init first -//call CLK_set_i2c1_freq(CHAN_SERCOM_I2C1, FREQ_I2C1_DEFAULT); -uint32_t CLK_set_i2c1_freq(uint8_t sercomn, uint32_t freq) -{ +// call CLK_oscctrl_init first +// call CLK_set_i2c1_freq(CHAN_SERCOM_I2C1, FREQ_I2C1_DEFAULT); +uint32_t CLK_set_i2c1_freq(uint8_t sercomn, uint32_t freq) { DBGC(DC_CLK_SET_I2C1_FREQ_BEGIN); - Gclk *pgclk = GCLK; + Gclk * pgclk = GCLK; Sercom *psercom = (Sercom *)sercom_apbbase[sercomn]; clk_enable_sercom_apbmask(sercomn); - //all gclk0 for now - pgclk->PCHCTRL[sercom_pchan[sercomn]].bit.GEN = 0; + // all gclk0 for now + pgclk->PCHCTRL[sercom_pchan[sercomn]].bit.GEN = 0; pgclk->PCHCTRL[sercom_pchan[sercomn]].bit.CHEN = 1; psercom->I2CM.CTRLA.bit.SWRST = 1; - while (psercom->I2CM.SYNCBUSY.bit.SWRST) {} - while (psercom->I2CM.CTRLA.bit.SWRST) {} + while (psercom->I2CM.SYNCBUSY.bit.SWRST) { + } + while (psercom->I2CM.CTRLA.bit.SWRST) { + } - psercom->I2CM.BAUD.bit.BAUD = (uint8_t) (system_clks.freq_gclk[0]/2/freq-10); - system_clks.freq_i2c1 = system_clks.freq_gclk[0]/2/(psercom->I2CM.BAUD.bit.BAUD+10); + psercom->I2CM.BAUD.bit.BAUD = (uint8_t)(system_clks.freq_gclk[0] / 2 / freq - 10); + system_clks.freq_i2c1 = system_clks.freq_gclk[0] / 2 / (psercom->I2CM.BAUD.bit.BAUD + 10); system_clks.freq_sercom[sercomn] = system_clks.freq_i2c1; DBGC(DC_CLK_SET_I2C1_FREQ_COMPLETE); @@ -377,15 +424,13 @@ uint32_t CLK_set_i2c1_freq(uint8_t sercomn, uint32_t freq) return system_clks.freq_i2c1; } -void CLK_init(void) -{ +void CLK_init(void) { DBGC(DC_CLK_INIT_BEGIN); - memset((void *)&system_clks,0,sizeof(system_clks)); + memset((void *)&system_clks, 0, sizeof(system_clks)); CLK_oscctrl_init(); CLK_enable_timebase(); DBGC(DC_CLK_INIT_COMPLETE); } - |