You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
64 lines
1.5 KiB
64 lines
1.5 KiB
#include "i2c_master.h"
|
|
#include "pca9555.h"
|
|
|
|
#include "debug.h"
|
|
|
|
#define SLAVE_TO_ADDR(n) (n<<1)
|
|
#define TIMEOUT 100
|
|
|
|
enum {
|
|
CMD_INPUT_0 = 0,
|
|
CMD_INPUT_1,
|
|
CMD_OUTPUT_0,
|
|
CMD_OUTPUT_1,
|
|
CMD_INVERSION_0,
|
|
CMD_INVERSION_1,
|
|
CMD_CONFIG_0,
|
|
CMD_CONFIG_1
|
|
};
|
|
|
|
void pca9555_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();
|
|
}
|
|
|
|
void pca9555_set_config(uint8_t slave_addr, uint8_t port, uint8_t conf) {
|
|
uint8_t addr = SLAVE_TO_ADDR(slave_addr);
|
|
uint8_t cmd = port ? CMD_OUTPUT_1 : CMD_OUTPUT_0;
|
|
|
|
i2c_status_t ret = i2c_writeReg(addr, cmd, &conf, sizeof(conf), TIMEOUT);
|
|
if (ret != I2C_STATUS_SUCCESS) {
|
|
print("pca9555_set_config::FAILED\n");
|
|
}
|
|
}
|
|
|
|
void pca9555_set_output(uint8_t slave_addr, uint8_t port, uint8_t conf) {
|
|
uint8_t addr = SLAVE_TO_ADDR(slave_addr);
|
|
uint8_t cmd = port ? CMD_CONFIG_1 : CMD_CONFIG_0;
|
|
|
|
i2c_status_t ret = i2c_writeReg(addr, cmd, &conf, sizeof(conf), TIMEOUT);
|
|
if (ret != I2C_STATUS_SUCCESS) {
|
|
print("pca9555_set_output::FAILED\n");
|
|
}
|
|
}
|
|
|
|
uint8_t pca9555_readPins(uint8_t slave_addr, uint8_t port) {
|
|
uint8_t addr = SLAVE_TO_ADDR(slave_addr);
|
|
uint8_t cmd = port ? CMD_INPUT_1 : CMD_INPUT_0;
|
|
|
|
uint8_t data = 0;
|
|
i2c_status_t ret = i2c_readReg(addr, cmd, &data, sizeof(data), TIMEOUT);
|
|
if (ret != I2C_STATUS_SUCCESS) {
|
|
print("pca9555_readPins::FAILED\n");
|
|
}
|
|
return data;
|
|
}
|