diff options
Diffstat (limited to 'drivers/gpio/pca9505.c')
| -rw-r--r-- | drivers/gpio/pca9505.c | 166 | 
1 files changed, 166 insertions, 0 deletions
| diff --git a/drivers/gpio/pca9505.c b/drivers/gpio/pca9505.c new file mode 100644 index 0000000000..5803746c96 --- /dev/null +++ b/drivers/gpio/pca9505.c @@ -0,0 +1,166 @@ +// Copyright 2022 nirim000 +// SPDX-License-Identifier: GPL-2.0-or-later + +#include "i2c_master.h" +#include "pca9505.h" + +#include "debug.h" + +#define SLAVE_TO_ADDR(n) (n << 1) +#define TIMEOUT 100 + +enum { +    CMD_INPUT_0 = 0, +    CMD_INPUT_1, +    CMD_INPUT_2, +    CMD_INPUT_3, +    CMD_INPUT_4, +    CMD_OUTPUT_0 = 8, +    CMD_OUTPUT_1, +    CMD_OUTPUT_2, +    CMD_OUTPUT_3, +    CMD_OUTPUT_4, +    CMD_INVERSION_0 = 16, +    CMD_INVERSION_1, +    CMD_INVERSION_2, +    CMD_INVERSION_3, +    CMD_INVERSION_4, +    CMD_CONFIG_0 = 24, +    CMD_CONFIG_1, +    CMD_CONFIG_2, +    CMD_CONFIG_3, +    CMD_CONFIG_4, +}; + +void pca9505_init(uint8_t slave_addr) { +    static uint8_t s_init = 0; +    if (!s_init) { +        i2c_init(); + +        s_init = 1; +    } + +    // TODO: could check device connected +    // i2c_start(SLAVE_TO_ADDR(slave) | I2C_WRITE); +    // i2c_stop(); +} + +bool pca9505_set_config(uint8_t slave_addr, pca9505_port_t port, uint8_t conf) { +    uint8_t addr = SLAVE_TO_ADDR(slave_addr); +    uint8_t cmd  = 0; +    switch (port) { +        case 0: +            cmd = CMD_CONFIG_0; +            break; +        case 1: +            cmd = CMD_CONFIG_1; +            break; +        case 2: +            cmd = CMD_CONFIG_2; +            break; +        case 3: +            cmd = CMD_CONFIG_3; +            break; +        case 4: +            cmd = CMD_CONFIG_4; +            break; +    } + +    i2c_status_t ret = i2c_writeReg(addr, cmd, &conf, sizeof(conf), TIMEOUT); +    if (ret != I2C_STATUS_SUCCESS) { +        print("pca9505_set_config::FAILED\n"); +        return false; +    } + +    return true; +} + +bool pca9505_set_polarity(uint8_t slave_addr, pca9505_port_t port, uint8_t conf) { +    uint8_t addr = SLAVE_TO_ADDR(slave_addr); +    uint8_t cmd  = 0; +    switch (port) { +        case 0: +            cmd = CMD_INVERSION_0; +            break; +        case 1: +            cmd = CMD_INVERSION_1; +            break; +        case 2: +            cmd = CMD_INVERSION_2; +            break; +        case 3: +            cmd = CMD_INVERSION_3; +            break; +        case 4: +            cmd = CMD_INVERSION_4; +            break; +    } + +    i2c_status_t ret = i2c_writeReg(addr, cmd, &conf, sizeof(conf), TIMEOUT); +    if (ret != I2C_STATUS_SUCCESS) { +        print("pca9505_set_polarity::FAILED\n"); +        return false; +    } + +    return true; +} + +bool pca9505_set_output(uint8_t slave_addr, pca9505_port_t port, uint8_t conf) { +    uint8_t addr = SLAVE_TO_ADDR(slave_addr); +    uint8_t cmd  = 0; +    switch (port) { +        case 0: +            cmd = CMD_OUTPUT_0; +            break; +        case 1: +            cmd = CMD_OUTPUT_1; +            break; +        case 2: +            cmd = CMD_OUTPUT_2; +            break; +        case 3: +            cmd = CMD_OUTPUT_3; +            break; +        case 4: +            cmd = CMD_OUTPUT_4; +            break; +    } + +    i2c_status_t ret = i2c_writeReg(addr, cmd, &conf, sizeof(conf), TIMEOUT); +    if (ret != I2C_STATUS_SUCCESS) { +        print("pca9505_set_output::FAILED\n"); +        return false; +    } + +    return true; +} + +bool pca9505_readPins(uint8_t slave_addr, pca9505_port_t port, uint8_t* out) { +    uint8_t addr = SLAVE_TO_ADDR(slave_addr); +    uint8_t cmd  = 0; +    switch (port) { +        case 0: +            cmd = CMD_INPUT_0; +            break; +        case 1: +            cmd = CMD_INPUT_1; +            break; +        case 2: +            cmd = CMD_INPUT_2; +            break; +        case 3: +            cmd = CMD_INPUT_3; +            break; +        case 4: +            cmd = CMD_INPUT_4; +            break; +    } + +    i2c_status_t ret = i2c_readReg(addr, cmd, out, sizeof(uint8_t), TIMEOUT); +    if (ret != I2C_STATUS_SUCCESS) { +        print("pca9505_readPins::FAILED\n"); +        return false; +    } + +    return true; +} | 
