SPI_2ic转串口芯片XR20M1170驱动程序(c源码)，包括底层驱动+API接口层.zip

#include "includes.h" #include "drv_xr20m1170.h" #include "drv_spi.h" XR20M1170_Handle_t xr20m1170_handle = { .baud_rate = 115200, //波特率 8, //数据位数，可选5、6、7、8位 0, //校验位, 0 -> 无校验，1 -> 奇校验，2 -> 偶校验 0, //停止位，0 -> 1位，1(5bit) -> 1~1.5位、1(6、7、8bit) -> 2位 16, //采样率，可选16倍采样率、8倍采样率、4倍采样率 TRUE, //FIFO使能 FALSE, //硬件流控 FALSE, //软件流控 FALSE, //RTS halt FALSE, //CTS流控 FALSE, //RS485自动控制 FALSE, //红外模式 FALSE, //内部回环 0, //TX FIFO触发等级 0, //RX FIFO触发等级 }; void drv_xr20m1170_reset(void) { gpio_set(SPI_UART_RST_GPIO, GPIO_PIN_RESET); HAL_Delay(100); gpio_set(SPI_UART_RST_GPIO, GPIO_PIN_SET); HAL_Delay(100); } /*****************************XR20M1170写一个寄存器值***********************************/ RET_CODE drv_xr20m1170_write_reg(uint8 reg_addr, uint8 value) { RET_CODE ret = RET_FAIL; uint8 inner_reg = 0x00; if(EFCR < reg_addr) return ret; //spi_uart_mutex_lock(); BSP_SPI_UART_CS_LOW(); inner_reg = reg_addr << REG_ADDR_POS; inner_reg &= REG_ADDR_MASK; inner_reg &= ~SPI_READ_WRITE; //syslog(DBG_LEVL_INFO, "Write inner_reg[0x%02X]", inner_reg); #if 0 spi_write_read_byte(BSP_SPI_XR20M1170, inner_reg); //先写地址 spi_write_read_byte(BSP_SPI_XR20M1170, value); //再写数据 #else SPI_Send_Dat(inner_reg); SPI_Send_Dat(value); #endif BSP_SPI_UART_CS_HIGH(); //spi_uart_mutex_unlock(); ret = RET_SUCCESS; return ret; } /*****************************XR20M1170读一个寄存器值***********************************/ uint8 drv_xr20m1170_read_reg(uint8 reg_addr) { uint8 value = 0x00; uint8 inner_reg = 0x00; if(EFCR < reg_addr) return value; //spi_uart_mutex_lock(); BSP_SPI_UART_CS_LOW(); inner_reg = reg_addr << REG_ADDR_POS; inner_reg &= REG_ADDR_MASK; inner_reg |= SPI_READ_WRITE; //syslog(DBG_LEVL_INFO, "Read inner_reg[0x%02X]", inner_reg); #if 0 spi_write_read_byte(BSP_SPI_XR20M1170, inner_reg); value =spi_write_read_byte(BSP_SPI_FALSH, 0xFF); #else SPI_Send_Dat(inner_reg); value =SPI_Receiver_Dat(); #endif BSP_SPI_UART_CS_HIGH(); //spi_uart_mutex_unlock(); return value; } /************************************XR20M1170写FIFO***********************************/ RET_CODE drv_xr20m1170_fifo_write(uint8 *data, uint16 len) { RET_CODE ret = RET_FAIL; uint8 inner_reg = 0x00; uint8 reg_addr = THR; uint16 i = 0; if((NULL == data)||(0 == len)) return ret; BSP_SPI_UART_CS_LOW(); inner_reg = reg_addr << REG_ADDR_POS; inner_reg &= REG_ADDR_MASK; inner_reg &= ~SPI_READ_WRITE; spi_write_read_byte(BSP_SPI_XR20M1170, inner_reg); //先写地址 for(i=0; i<len; i++) { //需先判断发送FIFO状态，然后在发送 spi_write_read_byte(BSP_SPI_XR20M1170, data[i]); //再写数据 } BSP_SPI_UART_CS_HIGH(); ret = RET_SUCCESS; return ret; } /************************************XR20M1170读FIFO***********************************/ uint16 drv_xr20m1170_fifo_read(uint8 *data, uint16 len) { uint16 i; uint8 inner_reg = 0x00; uint8 reg_addr = RHR; if((NULL == data)||(0 == len)) return i; BSP_SPI_UART_CS_LOW(); inner_reg = reg_addr << REG_ADDR_POS; inner_reg &= REG_ADDR_MASK; inner_reg |= SPI_READ_WRITE; spi_write_read_byte(BSP_SPI_XR20M1170, inner_reg); for(i=0; i<len; i++) { //需要注意FIFO为空的情况 data[i] =spi_write_read_byte(BSP_SPI_FALSH, 0xFF); } BSP_SPI_UART_CS_HIGH(); return i; } /************************************XR20M1170设置波特率***********************************/ RET_CODE drv_xr20m1170_set_baud_rate(XR20M1170_Handle_t *xr20_handle) { RET_CODE ret = RET_FAIL; float divisor = 0.0; uint32 divisor_int = 0; float divisor_frac = 0; uint32 baud_rate = 0; uint8 sample_rate = 0; uint8 prescaler = 1; uint8 dlm_value = 0; uint8 dll_value = 0; uint8 dld_value = 0; uint8 lcr_value = 0; if(NULL == xr20_handle) return ret; sample_rate =0; switch(xr20_handle->sampling_rate) { case 16: sample_rate =0; break; case 8: sample_rate =1; break; case 4: sample_rate =2; break; default: sample_rate =0; break; } /*Required Divisor (decimal)=(XTAL1 clock frequency / prescaler) /(serial data rate x 16), with 16X mode*/ baud_rate = xr20_handle->baud_rate; if( 0 == baud_rate) baud_rate = 115200; divisor = (XTAL1_FREQ / prescaler) / (baud_rate * xr20_handle->sampling_rate); divisor_int = (uint32)divisor/1*1; divisor_frac = (divisor - divisor_int) * 16; if(((uint32)(divisor_frac * 10) % 10) >= 5) divisor_frac += 1; dlm_value = divisor_int >> 8; dll_value = divisor_int & 0xFF; dld_value = (uint8)divisor_frac; dld_value &= ~DLD_SAMP_RATE_MASK; dld_value |= sample_rate << DLD_SAMP_RATE_POS; syslog(DBG_LEVL_INFO,"baud_rate = %d, dlm_value[0x%x], dll_value[0x%x], dld_value[0x%x]", baud_rate, dlm_value, dll_value, dld_value); //设置波特率 ret = drv_xr20m1170_write_reg (EFR, 0x10); // enable shaded bits and access to DLD lcr_value = drv_xr20m1170_read_reg(LCR); lcr_value |= 1<<LCR_B_R_D_EN_POS; ret &= drv_xr20m1170_write_reg(LCR, lcr_value); //enable access to divisors ret &= drv_xr20m1170_write_reg(DLM, dlm_value); ret &= drv_xr20m1170_write_reg(DLL, dll_value); ret &= drv_xr20m1170_write_reg(DLD, dld_value); lcr_value &= ~LCR_B_R_D_EN_MASK; ret &= drv_xr20m1170_write_reg(LCR, lcr_value); ret = drv_xr20m1170_write_reg (EFR, 0x00); // disable shaded bits return ret; } /************************************XR20M1170设置数据位***********************************/ RET_CODE drv_xr20m1170_set_data_bit(XR20M1170_Handle_t *xr20_handle) { RET_CODE ret = RET_FAIL; uint8 data_bit = 0; uint8 lcr_value = 0; if(NULL == xr20_handle) return ret; lcr_value = drv_xr20m1170_read_reg(LCR); //设置位数 switch(xr20_handle->data_bit_num) { case 5: data_bit = 0; break; case 6: data_bit = 1; break; case 7: data_bit = 2; break; case 8: data_bit = 3; break; default: data_bit = 3; break; } lcr_value &= ~LCR_WORD_LEN_MASK; lcr_value |=data_bit << LCR_WORD_LEN_POS; ret &= drv_xr20m1170_write_reg(LCR, lcr_value); //8N1 data format return ret; } /************************************XR20M1170设置停止位***********************************/ RET_CODE drv_xr20m1170_set_stop_bit(XR20M1170_Handle_t *xr20_handle) { RET_CODE ret = RET_FAIL; uint8 stop_bit = 0; uint8 lcr_value = 0; if(NULL == xr20_handle) return ret; lcr_value = drv_xr20m1170_read_reg(LCR); //停止位 stop_bit = xr20_handle->stop_bit; lcr_value &= ~LCR_STOP_BIT_MSAS; lcr_value |=stop_bit << LCR_STOP_BIT_POS; ret &= drv_xr20m1170_write_reg(LCR, lcr_value); //8N1 data format return ret; } /************************************XR20M1170设置校验位***********************************/ RET_CODE drv_xr20m1170_set_parity_bit(XR20M1170_Handle_t *xr20_handle) { RET_CODE ret = RET_FAIL; uint8 parity_bit = 0; uint8 parity_sel = 0; uint8 lcr_value = 0; if(NULL == xr20_handle) return ret; lcr_value = drv_xr20m1170_read_reg(LCR); //校验位 switch (xr20_handle->parity_bit) { case 0: //无校验 parity_bit = 0; parity_sel = 0; break; case 1: //奇校验 parity_bit = 1; parity_sel = 0; break; case 2: //偶校验 parity_bit = 1; parity_sel = 1; break; default: parity_bit = 0; parity_sel = 0; break; } lcr_value &= ~LCR_PARITY_EN_MASK; lcr_value |=parity_bit << LCR_PARITY_EN_POS; lcr_value &= ~LCR_PARITY_SEL_MASK; lcr_value |=parity_sel << LCR_PARITY_SEL_POS; ret &= drv_xr20m1170_write_reg(LCR, lcr_value); //8N1 data format return ret; } /******