86 lines
2.6 KiB
C
86 lines
2.6 KiB
C
#include <api-hal-i2c.h>
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#include <stm32wbxx_ll_bus.h>
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#include <stm32wbxx_ll_i2c.h>
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#include <stm32wbxx_ll_rcc.h>
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#include <stm32wbxx_ll_gpio.h>
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void api_hal_i2c_init() {
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LL_I2C_InitTypeDef I2C_InitStruct = {0};
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LL_GPIO_InitTypeDef GPIO_InitStruct = {0};
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LL_RCC_SetI2CClockSource(LL_RCC_I2C1_CLKSOURCE_PCLK1);
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LL_AHB2_GRP1_EnableClock(LL_AHB2_GRP1_PERIPH_GPIOA);
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GPIO_InitStruct.Pin = I2C_SCL_Pin | I2C_SDA_Pin;
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GPIO_InitStruct.Mode = LL_GPIO_MODE_ALTERNATE;
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GPIO_InitStruct.Speed = LL_GPIO_SPEED_FREQ_LOW;
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GPIO_InitStruct.OutputType = LL_GPIO_OUTPUT_OPENDRAIN;
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GPIO_InitStruct.Pull = LL_GPIO_PULL_NO;
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GPIO_InitStruct.Alternate = LL_GPIO_AF_4;
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LL_GPIO_Init(GPIOA, &GPIO_InitStruct);
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LL_APB1_GRP1_EnableClock(LL_APB1_GRP1_PERIPH_I2C1);
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I2C_InitStruct.PeripheralMode = LL_I2C_MODE_I2C;
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I2C_InitStruct.Timing = 0x10707DBC;
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I2C_InitStruct.AnalogFilter = LL_I2C_ANALOGFILTER_ENABLE;
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I2C_InitStruct.DigitalFilter = 0;
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I2C_InitStruct.OwnAddress1 = 0;
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I2C_InitStruct.TypeAcknowledge = LL_I2C_ACK;
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I2C_InitStruct.OwnAddrSize = LL_I2C_OWNADDRESS1_7BIT;
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LL_I2C_Init(I2C1, &I2C_InitStruct);
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LL_I2C_EnableAutoEndMode(I2C1);
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LL_I2C_SetOwnAddress2(I2C1, 0, LL_I2C_OWNADDRESS2_NOMASK);
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LL_I2C_DisableOwnAddress2(I2C1);
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LL_I2C_DisableGeneralCall(I2C1);
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LL_I2C_EnableClockStretching(I2C1);
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}
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void api_hal_i2c_tx(I2C_TypeDef* instance, uint8_t address, const uint8_t* data, uint8_t size) {
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LL_I2C_HandleTransfer(
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instance,
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address,
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LL_I2C_ADDRSLAVE_7BIT,
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size,
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LL_I2C_MODE_AUTOEND,
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LL_I2C_GENERATE_START_WRITE);
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while(!LL_I2C_IsActiveFlag_STOP(instance)) {
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if(LL_I2C_IsActiveFlag_TXIS(instance)) {
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LL_I2C_TransmitData8(instance, (*data++));
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}
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}
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LL_I2C_ClearFlag_STOP(instance);
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}
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void api_hal_i2c_rx(I2C_TypeDef* instance, uint8_t address, uint8_t* data, uint8_t size) {
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LL_I2C_HandleTransfer(
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instance,
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address,
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LL_I2C_ADDRSLAVE_7BIT,
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size,
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LL_I2C_MODE_AUTOEND,
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LL_I2C_GENERATE_START_READ);
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while(!LL_I2C_IsActiveFlag_STOP(instance)) {
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if(LL_I2C_IsActiveFlag_RXNE(instance)) {
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*data++ = LL_I2C_ReceiveData8(instance);
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}
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}
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LL_I2C_ClearFlag_STOP(instance);
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}
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void api_hal_i2c_trx(
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I2C_TypeDef* instance,
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uint8_t address,
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const uint8_t* tx_data,
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uint8_t tx_size,
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uint8_t* rx_data,
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uint8_t rx_size) {
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api_hal_i2c_tx(instance, address, tx_data, tx_size);
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api_hal_i2c_rx(instance, address, rx_data, rx_size);
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}
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