diff options
Diffstat (limited to 'tests/i2c-master/main-stm32f4-disco.c')
| -rw-r--r-- | tests/i2c-master/main-stm32f4-disco.c | 138 |
1 files changed, 17 insertions, 121 deletions
diff --git a/tests/i2c-master/main-stm32f4-disco.c b/tests/i2c-master/main-stm32f4-disco.c index f5594c0..1e30791 100644 --- a/tests/i2c-master/main-stm32f4-disco.c +++ b/tests/i2c-master/main-stm32f4-disco.c @@ -18,142 +18,47 @@ #define LED_DISCO_GREEN_PORT GPIOD #define LED_DISCO_GREEN_PIN GPIO12 -#define CODEC_ADDRESS 0x4a - struct hw_detail hw_details = { .periph = I2C1, .periph_rcc = RCC_I2C1, .periph_rst = RST_I2C1, - .pins = GPIO6 | GPIO9, /* FIXME - only for onboard! */ +// .pins = GPIO6 | GPIO9, /* FIXME - only for onboard! */ + .pins = GPIO8 | GPIO9, /* For SHT21 on I2c1 */ .port = GPIOB, .port_rcc = RCC_GPIOB, }; -static void codec_gpio_init(void) +static void setup_i2c_gpio(void) { /* reset pin */ - rcc_periph_clock_enable(RCC_GPIOD); - gpio_mode_setup(GPIOD, GPIO_MODE_OUTPUT, GPIO_PUPD_NONE, GPIO4); +// rcc_periph_clock_enable(RCC_GPIOD); +// gpio_mode_setup(GPIOD, GPIO_MODE_OUTPUT, GPIO_PUPD_NONE, GPIO4); /* i2c control lines */ - rcc_periph_clock_enable(RCC_GPIOB); - gpio_mode_setup(GPIOB, GPIO_MODE_AF, GPIO_PUPD_NONE, GPIO6 | GPIO9); - gpio_set_output_options(GPIOB, GPIO_OTYPE_OD, GPIO_OSPEED_50MHZ, GPIO6 | GPIO9); - gpio_set_af(GPIOB, GPIO_AF4, GPIO6 | GPIO9); + rcc_periph_clock_enable(hw_details.port_rcc); + gpio_mode_setup(hw_details.port, GPIO_MODE_AF, GPIO_PUPD_NONE, hw_details.pins); + gpio_set_output_options(hw_details.port, GPIO_OTYPE_OD, GPIO_OSPEED_50MHZ, hw_details.pins); + gpio_set_af(hw_details.port, GPIO_AF4, hw_details.pins); } static void codec_init(void) { int i; /* Configure the Codec related IOs */ - codec_gpio_init(); + setup_i2c_gpio(); /* reset the codec */ - gpio_clear(GPIOD, GPIO4); +// gpio_clear(GPIOD, GPIO4); for (i = 0; i < 1000000; i++) { /* Wait a bit. */ __asm__("NOP"); } - gpio_set(GPIOD, GPIO4); +// gpio_set(GPIOD, GPIO4); i2cm_init(); } -static int codec_write_reg(uint8_t reg, uint8_t val) -{ - uint32_t i2c = I2C1; - - while ((I2C_SR2(i2c) & I2C_SR2_BUSY)) { - } - - i2c_send_start(i2c); - - /* Wait for master mode selected */ - while (!((I2C_SR1(i2c) & I2C_SR1_SB) - & (I2C_SR2(i2c) & (I2C_SR2_MSL | I2C_SR2_BUSY)))); - - i2c_send_7bit_address(i2c, CODEC_ADDRESS, I2C_WRITE); - - /* Waiting for address is transferred. */ - while (!(I2C_SR1(i2c) & I2C_SR1_ADDR)); - - /* Cleaning ADDR condition sequence. */ - uint32_t reg32 = I2C_SR2(i2c); - (void) reg32; /* unused */ - - /* Common above here */ - - /* Sending the data. */ - i2c_send_data(i2c, reg); - while (!(I2C_SR1(i2c) & (I2C_SR1_BTF))); - i2c_send_data(i2c, val); - while (!(I2C_SR1(i2c) & (I2C_SR1_BTF | I2C_SR1_TxE))); - - /* Send STOP condition. */ - i2c_send_stop(i2c); - return 0; -} - -static uint32_t codec_read_reg(uint8_t reg) -{ - uint32_t i2c = I2C1; - - while ((I2C_SR2(i2c) & I2C_SR2_BUSY)) { - } - - i2c_send_start(i2c); - - /* Wait for master mode selected */ - while (!((I2C_SR1(i2c) & I2C_SR1_SB) - & (I2C_SR2(i2c) & (I2C_SR2_MSL | I2C_SR2_BUSY)))); - - i2c_send_7bit_address(i2c, CODEC_ADDRESS, I2C_WRITE); - - /* Waiting for address is transferred. */ - while (!(I2C_SR1(i2c) & I2C_SR1_ADDR)); - - /* Cleaning ADDR condition sequence. */ - uint32_t reg32 = I2C_SR2(i2c); - (void) reg32; /* unused */ - - /* Common stuff ABOVE HERE */ - - i2c_send_data(i2c, reg); - while (!(I2C_SR1(i2c) & (I2C_SR1_BTF))); - - i2c_send_start(i2c); - - /* Wait for master mode selected */ - while (!((I2C_SR1(i2c) & I2C_SR1_SB) - & (I2C_SR2(i2c) & (I2C_SR2_MSL | I2C_SR2_BUSY)))); - - i2c_send_7bit_address(i2c, CODEC_ADDRESS, I2C_READ); - - /* Waiting for address is transferred. */ - while (!(I2C_SR1(i2c) & I2C_SR1_ADDR)); - - i2c_disable_ack(i2c); - - /* Cleaning ADDR condition sequence. */ - reg32 = I2C_SR2(i2c); - (void) reg32; /* unused */ - - i2c_send_stop(i2c); - - while (!(I2C_SR1(i2c) & I2C_SR1_RxNE)); - uint32_t result = i2c_get_data(i2c); - - i2c_enable_ack(i2c); - I2C_SR1(i2c) &= ~I2C_SR1_AF; - return result; -} - -static void codec_readid(void) -{ - uint8_t res = codec_read_reg(0x01); - printf("raw res = %#x Codec is %#x (should be 0x1c), revision %d\n", res, res >> 3, res & 0x7); -} int main(void) { @@ -165,22 +70,13 @@ int main(void) LED_DISCO_GREEN_PIN); printf("hi guys!\n"); codec_init(); - codec_readid(); - codec_write_reg(0x14, 0xff); - for (i = 0; i < 8; i++) { - uint8_t pass_vol_a = codec_read_reg(0x14); - printf("Passthrough vol A was: %#x\n", pass_vol_a); - codec_write_reg(0x14, pass_vol_a >> 1); - gpio_toggle(LED_DISCO_GREEN_PORT, LED_DISCO_GREEN_PIN); - for (j = 0; j < 100000; j++) { /* Wait a bit. */ - __asm__("NOP"); - } - } - - /* Nothing else to do */; while (1) { - ; + i2cm_task(); + gpio_toggle(LED_DISCO_GREEN_PORT, LED_DISCO_GREEN_PIN); + for (i = 0; i < 0x800000; i++) { /* Wait a bit. */ + __asm__("NOP"); + } } return 0; } |