diff options
Diffstat (limited to 'stm/mma.c')
| -rw-r--r-- | stm/mma.c | 10 |
1 files changed, 5 insertions, 5 deletions
@@ -6,7 +6,7 @@ #include "mma.h" -void mma_init() { +void mma_init(void) { RCC->APB1ENR |= RCC_APB1ENR_I2C1EN; // enable I2C1 //gpio_pin_init(GPIOB, 6 /* B6 is SCL */, 2 /* AF mode */, 1 /* open drain output */, 1 /* 25 MHz */, 0 /* no pull up or pull down */); //gpio_pin_init(GPIOB, 7 /* B7 is SDA */, 2 /* AF mode */, 1 /* open drain output */, 1 /* 25 MHz */, 0 /* no pull up or pull down */); @@ -46,7 +46,7 @@ void mma_init() { // set START bit in CR1 to generate a start cond! } -static uint32_t i2c_get_sr() { +static uint32_t i2c_get_sr(void) { // must read SR1 first, then SR2, as the read can clear some flags uint32_t sr1 = I2C1->SR1; uint32_t sr2 = I2C1->SR2; @@ -98,7 +98,7 @@ void mma_send_byte(uint8_t data) { } } -uint8_t mma_read_ack() { +uint8_t mma_read_ack(void) { // enable ACK of received byte I2C1->CR1 |= I2C_CR1_ACK; // wait for BUSY, MSL and RXNE (byte received) @@ -109,7 +109,7 @@ uint8_t mma_read_ack() { return data; } -uint8_t mma_read_nack() { +uint8_t mma_read_nack(void) { // disable ACK of received byte (to indicate end of receiving) I2C1->CR1 &= (uint16_t)~((uint16_t)I2C_CR1_ACK); // last byte should apparently also generate a stop condition @@ -122,7 +122,7 @@ uint8_t mma_read_nack() { return data; } -void mma_stop() { +void mma_stop(void) { // send stop condition I2C1->CR1 |= I2C_CR1_STOP; } |