224 lines
5.4 KiB
C
224 lines
5.4 KiB
C
/******************************************************************************
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* @file drv_adbms1818.c
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* @brief ads8688 drivers
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* @version V1.0
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* @author Gary
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* @copyright
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******************************************************************************/
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#include "drv_ads8688.h"
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#include "drv_spi.h"
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#include "kit_time.h"
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void drv_set_ads8688_cs(GpioStatus state)
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{
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drv_gpio_set_pin_status(kGpioType_ADC_Cs, state);
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}
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void drv_set_ads8688_rst(GpioStatus state)
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{
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drv_gpio_set_pin_status(kGpioType_ADC_Reset, state);
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}
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uint8_t drv_ads8688_spi_send_rev(uint8_t data)
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{
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return drv_spi_sync_send_rev(kSpiDev_2, data);
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}
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// 初始化ADS8688，并且检验读入寄存器数据和写入的是否一样
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// 返回TURE则说明初始化正常，否则错误
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bool drv_ads8688_Init(void)
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{
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uint8_t i = 0;
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drv_spi_init(kSpiDev_2, kSpiFreq_Div256, kSpiMode_C0E1, SpiFrame_MSBFirst, kGpioType_ADC_Clk, kGpioType_ADC_Miso, kGpioType_ADC_Mosi);
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//drv_ads8688_Reset();// hardware reset
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drv_enter_pwrdn_mode();
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OSTimeDly(20);
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drv_enter_standby_mode();
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OSTimeDly(20);
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drv_reset_ads8688();
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OSTimeDly(20);
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drv_set_ch_range(Channel_0_Input_Range,VREF_25_25);
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drv_set_ch_range(Channel_1_Input_Range,VREF_25_25);
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drv_set_ch_range(Channel_2_Input_Range,VREF_25_25);
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drv_set_ch_range(Channel_3_Input_Range,VREF_25_25);
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drv_set_ch_range(Channel_4_Input_Range,VREF_25_25);
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drv_set_ch_range(Channel_5_Input_Range,VREF_25_25);
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drv_set_ch_pwrdn(Channel_6_Input_Range);
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drv_set_ch_pwrdn(Channel_7_Input_Range);
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drv_ads8688_write_reg(AUTO_SEQ_EN, 0x3F);
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i = drv_ads8688_read_reg(AUTO_SEQ_EN);
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if (i != 0x3F)
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{
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return true;
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}
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else
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{
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drv_enter_auto_rst_mode(); // 进入自动扫描模式
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OSTimeDly(20);
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return false;
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}
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}
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void drv_ads8688_Reset(void) // hardware reset
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{
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uint8_t i = 5;
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drv_set_ads8688_rst(kGpioStatus_Low);
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OSTimeDly(10);
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while (i--)
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;
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drv_set_ads8688_rst(kGpioStatus_High);
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}
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void drv_ads8688_pwrdn(void) // hardware power-down
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{
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uint8_t i = 50;
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drv_set_ads8688_rst(kGpioStatus_Low);
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while (i--)
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;
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}
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void drv_ads8688_pwrup(void) // power-down
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{
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drv_set_ads8688_rst(kGpioStatus_High);
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}
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void drv_ads8688_write_cmd_reg(uint16_t command) // 写ADS8688命令寄存器
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{
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drv_set_ads8688_cs(kGpioStatus_Low);
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drv_ads8688_spi_send_rev(command >> 8 & 0xFF);
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drv_ads8688_spi_send_rev(command & 0xFF);
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drv_set_ads8688_cs(kGpioStatus_High);
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}
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void drv_reset_ads8688(void) // 软件复位模式，复位 program registers
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{
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drv_ads8688_write_cmd_reg(RST);
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}
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// 进入STDBY模式，且命令发送后CS立刻置高，不读数据帧；
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// 退出此模式需执行AUTO_RST或者MAN_CH_n命令，且需要等待至少20us以保证正常数据的AD转换
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void drv_enter_standby_mode(void)
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{
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drv_ads8688_write_cmd_reg(STDBY);
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}
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// 进入PWR_DN模式，且命令发送后CS立刻置高，不读数据帧；
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// 退出此模式需执行AUTO_RST或者MAN_CH_n命令，且需要等待至少15ms以保证正常数据的AD转换
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void drv_enter_pwrdn_mode(void) // 此为软件方式进入PWR_DN模式，与硬件方式区别是不改变 program registers
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{
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drv_ads8688_write_cmd_reg(PWR_DN);
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}
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void drv_enter_auto_rst_mode(void) // 进入自动扫描模式
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{
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drv_ads8688_write_cmd_reg(AUTO_RST);
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}
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// 读取扫描通道序列的AD转换数据code到变量数组中
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void drv_enter_auto_rst_mode_Data(uint16_t *outputdata, uint8_t chnum)
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{
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uint8_t i = 0, datal = 0, datah = 0;
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uint16_t data = 0;
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for (i = 0; i < chnum; i++)
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{
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drv_set_ads8688_cs(kGpioStatus_Low);
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drv_ads8688_spi_send_rev(0x00);
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drv_ads8688_spi_send_rev(0x00);
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datah = drv_ads8688_spi_send_rev(0xFF);
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datal = drv_ads8688_spi_send_rev(0xFF);
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drv_set_ads8688_cs(kGpioStatus_High);
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data = datah << 8 | datal; // 高位在前，低位在后
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*(outputdata + i) = data;
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}
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}
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void drv_manual_chn_mode(uint16_t ch) // 手动模式
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{
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drv_ads8688_write_cmd_reg(ch);
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}
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// 读取手动通道的AD转换数据code
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uint16_t drv_manual_chn_mode_Data(void)
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{
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uint8_t datah = 0, datal = 0;
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drv_set_ads8688_cs(kGpioStatus_Low);
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drv_ads8688_spi_send_rev(0x00);
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drv_ads8688_spi_send_rev(0x00);
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datah = drv_ads8688_spi_send_rev(0xFF);
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datal = drv_ads8688_spi_send_rev(0xFF);
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drv_set_ads8688_cs(kGpioStatus_High);
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return (datah << 8 | datal);
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}
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//Gary add function
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uint16_t drv_get_ads8688_ch_data(uint16_t ch)
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{
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drv_manual_chn_mode(ch);
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return drv_manual_chn_mode_Data();
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}
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// Program Register写操作
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void drv_ads8688_write_reg(uint8_t Addr, uint8_t data)
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{
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drv_set_ads8688_cs(kGpioStatus_Low);
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drv_ads8688_spi_send_rev(Addr << 1 | WRITE);
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drv_ads8688_spi_send_rev(data);
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drv_set_ads8688_cs(kGpioStatus_High);
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}
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// Program Register读操作
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uint8_t drv_ads8688_read_reg(uint8_t Addr)
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{
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uint8_t data = 0;
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drv_set_ads8688_cs(kGpioStatus_Low);
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drv_ads8688_spi_send_rev(Addr << 1 | READ);
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data = drv_ads8688_spi_send_rev(0xFF);
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data = drv_ads8688_spi_send_rev(0xFF);
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drv_set_ads8688_cs(kGpioStatus_High);
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return data;
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}
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void drv_set_auto_scan_sequence(uint8_t seq) // 设置自动扫描序列通道
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{
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drv_ads8688_write_reg(0x01, seq);
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}
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void drv_set_ch_pwrdn(uint8_t chn) // 设置通道n为Power Down
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{
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drv_ads8688_write_reg(0X02, chn);
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}
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void drv_set_ch_range(uint8_t ch, uint8_t range) // 设置各个通道的范围
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{
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drv_ads8688_write_reg(ch, range);
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}
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int16_t drv_ads8688_value(uint16_t value)
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{
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int32_t ret = 0;
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uint16_t tmp = 0;
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tmp = value & 0x7FFF;
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if(KIT_GET_BIT_VAL(value, 15) == 1)
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{
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return tmp;
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}
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else
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{
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return -tmp;
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}
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}
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