bsp_adc.c 7.0 KB

123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246247248249250251252253254255256257258259260261262263264265266267268269270271272
  1. /*********************************************************************
  2. * INCLUDES
  3. */
  4. #include "bsp_adc.h"
  5. #include "system.h"
  6. #include "exception.h"
  7. /*********************************************************************
  8. * DEFINITIONS
  9. */
  10. #define CHANNEL_MAX 8
  11. #define PIN_NOT_USED 0xFF
  12. #define CHANNEL_NOT_USED 0xFF
  13. #define WAIT_TIME_VALUE 10000 // 等待超时最大值
  14. /*********************************************************************
  15. * STRUCTION
  16. */
  17. typedef struct {
  18. uint32_t pin;
  19. uint32_t channel;
  20. }adc_config_t;
  21. /*********************************************************************
  22. * LOCAL VARIABLES
  23. */
  24. static adc_config_t m_adc_config[CHANNEL_MAX] = {{PIN_NOT_USED,CHANNEL_NOT_USED},{PIN_NOT_USED,CHANNEL_NOT_USED},{PIN_NOT_USED,CHANNEL_NOT_USED},{PIN_NOT_USED,CHANNEL_NOT_USED},{PIN_NOT_USED,CHANNEL_NOT_USED},{PIN_NOT_USED,CHANNEL_NOT_USED},{PIN_NOT_USED,CHANNEL_NOT_USED},{PIN_NOT_USED,CHANNEL_NOT_USED}};
  25. static nrf_saadc_channel_config_t channelConfig[CHANNEL_MAX];
  26. static nrf_saadc_value_t s_bufferPool[CHANNEL_MAX] = {0};
  27. static volatile bool adc_SampleOk = true; // adc采集完成标志
  28. //定义SAADC采样数据缓存
  29. //定义SAADC采样缓存数组大小
  30. //只有采样结果存满该缓存之后,才会产生SAADC采样完成事件
  31. static uint32_t sample_in_buffer = 0;
  32. /*********************************************************************
  33. * LOCAL FUNCTIONS
  34. */
  35. /**
  36. @brief ADC中断处理回调函数
  37. @param 无
  38. @return 无
  39. */
  40. static void adcCallbackFunc(nrf_drv_saadc_evt_t const *pEvent)
  41. {
  42. ret_code_t err_code;
  43. if(pEvent->type == NRF_DRV_SAADC_EVT_DONE) // 采样完成,采集时填充顺序为,通道编号小的先填充。
  44. {
  45. //设置好缓存,为下一次采样做准备
  46. err_code=nrf_drv_saadc_buffer_convert(pEvent->data.done.p_buffer,sample_in_buffer);
  47. if(err_code == NRF_SUCCESS)
  48. {
  49. adc_SampleOk = true;
  50. }
  51. }
  52. }
  53. static void bsp_adc_init_process(void)
  54. {
  55. if(Except_TxError(EXCEPT_ADC_INIT,"bsp_adc_init_error\r\n") == 0)
  56. {
  57. Process_Stop(bsp_adc_init_process);
  58. }
  59. }
  60. /**
  61. @brief 初始化ADC
  62. @param 无
  63. @return 无
  64. */
  65. static void ADC_Init(void)
  66. {
  67. int ret = 0;
  68. ret_code_t errCode;
  69. nrf_drv_saadc_config_t p_config = NRFX_SAADC_DEFAULT_CONFIG;
  70. p_config.interrupt_priority = ADC_IRQ_PRIORITY;
  71. // ADC初始化
  72. errCode = nrf_drv_saadc_init(&p_config, adcCallbackFunc);//优先级设置为3,比定时器中断要高,不然回调会在定时器中断结束后触发。
  73. if(errCode != NRF_SUCCESS)ret = -1;
  74. // ADC通道配置
  75. for(int i=0;i<CHANNEL_MAX;i++)
  76. {
  77. if(m_adc_config[i].pin != PIN_NOT_USED && m_adc_config[i].channel != CHANNEL_NOT_USED)
  78. {
  79. // ADC通道初始化
  80. errCode = nrf_drv_saadc_channel_init(m_adc_config[i].channel, &channelConfig[m_adc_config[i].channel]);
  81. if(errCode != NRF_SUCCESS)ret = -1;
  82. }
  83. }
  84. if(sample_in_buffer > 0)
  85. {
  86. // 缓冲配置
  87. errCode = nrf_drv_saadc_buffer_convert(s_bufferPool, sample_in_buffer);
  88. if(errCode != NRF_SUCCESS)ret = -1;
  89. }
  90. if(ret == -1)
  91. {
  92. Process_Start(0,"bsp_adc_init_process",bsp_adc_init_process);
  93. }
  94. }
  95. static void cb_adcWakeup(uint32_t t)
  96. {
  97. ADC_Enable();
  98. }
  99. static void cb_adcSleep(uint32_t t)
  100. {
  101. ADC_Disable();
  102. }
  103. /*********************************************************************
  104. * PUBLIC FUNCTIONS
  105. */
  106. /**
  107. @brief 初始化ADC引脚和通道
  108. @param pin -[in] 需要初始化的adc引脚
  109. @param channel -[in] 需要初始化的adc通道
  110. @return 错误代码
  111. */
  112. uint32_t ADC_SetPinChannel(uint32_t pin, uint32_t channel,nrf_gpio_pin_pull_t pin_pull)
  113. {
  114. ret_code_t errCode;
  115. //清除已存在的引脚和通道
  116. ADC_RemovePinChannel(pin, channel);
  117. for(int i=0;i<CHANNEL_MAX;i++)
  118. {
  119. if(m_adc_config[i].pin == PIN_NOT_USED && m_adc_config[i].channel == CHANNEL_NOT_USED && PIN_NOT_USED != pin)
  120. {
  121. m_adc_config[i].pin = pin;
  122. m_adc_config[i].channel = channel;
  123. //设置ADC引脚为浮空
  124. nrf_gpio_cfg_input(m_adc_config[i].pin,pin_pull);
  125. // 单端输入
  126. channelConfig[m_adc_config[i].channel].resistor_p = NRF_SAADC_RESISTOR_DISABLED;
  127. channelConfig[m_adc_config[i].channel].resistor_n = NRF_SAADC_RESISTOR_DISABLED;
  128. channelConfig[m_adc_config[i].channel].gain = NRF_SAADC_GAIN1_6;
  129. channelConfig[m_adc_config[i].channel].reference = NRF_SAADC_REFERENCE_INTERNAL;
  130. channelConfig[m_adc_config[i].channel].acq_time = NRF_SAADC_ACQTIME_10US;
  131. channelConfig[m_adc_config[i].channel].mode = NRF_SAADC_MODE_SINGLE_ENDED;
  132. channelConfig[m_adc_config[i].channel].burst = NRF_SAADC_BURST_DISABLED;
  133. channelConfig[m_adc_config[i].channel].pin_p = (nrf_saadc_input_t)(m_adc_config[i].channel + 1);
  134. channelConfig[m_adc_config[i].channel].pin_n = NRF_SAADC_INPUT_DISABLED;
  135. // ADC通道初始化
  136. errCode = nrf_drv_saadc_channel_init(m_adc_config[i].channel, &channelConfig[m_adc_config[i].channel]);
  137. if(errCode != NRF_SUCCESS)return ADC_ERR_INIT_CONGESTION;
  138. sample_in_buffer++;
  139. DEBUG_LOG("add channel ( %d ):\n", channel);
  140. return ADC_OP_SUCCESS;
  141. }
  142. }
  143. return ADC_ERR_INIT_CONGESTION;
  144. }
  145. /**
  146. @brief 移除已初始化ADC引脚和通道
  147. @param pin -[in] 需要移除的adc引脚
  148. @param channel -[in] 需要移除的adc通道
  149. @return 错误代码
  150. */
  151. uint32_t ADC_RemovePinChannel(uint32_t pin, uint32_t channel)
  152. {
  153. for(int i=0;i<CHANNEL_MAX;i++)
  154. {
  155. if(m_adc_config[i].pin == pin && m_adc_config[i].channel == channel)
  156. {
  157. nrf_drv_saadc_channel_uninit(m_adc_config[i].channel);
  158. m_adc_config[i].pin = PIN_NOT_USED;
  159. m_adc_config[i].channel = CHANNEL_NOT_USED;
  160. if(sample_in_buffer != 0)sample_in_buffer--;
  161. DEBUG_LOG("del channel ( %d ):\n", channel);
  162. return ADC_OP_SUCCESS;
  163. }
  164. }
  165. return ADC_ERR_REMOVE_PIN_CHANNEL;
  166. }
  167. /**
  168. @brief ADC初始化
  169. @param 无
  170. @return 无
  171. */
  172. void ADC_Initialize(void)
  173. {
  174. ADC_SetPinChannel(PIN_ADC_BAT_IN, PIN_ADC_BAT_CHANNEL,NRF_GPIO_PIN_NOPULL);
  175. ADC_SetPinChannel(PIN_ADC_CHARGMEASURE, PIN_ADC_CHARGMEASURE_CHANNEL,NRF_GPIO_PIN_NOPULL);
  176. ADC_Init();
  177. Wakeup_Regist(cb_adcWakeup);
  178. Sleep_Regist(cb_adcSleep);
  179. }
  180. /**
  181. @brief ADC读取
  182. @param channel -[in] 需要读取的通道
  183. @param p_adc_value -[out] 返回读取的通道值
  184. @return 错误代码
  185. */
  186. uint32_t ADC_Read(uint32_t channel, int16_t *p_adc_value)
  187. {
  188. uint32_t errCode;
  189. uint32_t wait_time_out = WAIT_TIME_VALUE;
  190. uint8_t adc_sort[CHANNEL_MAX] = {0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF};
  191. uint8_t sort_index = 0;
  192. int i;
  193. adc_SampleOk = false;
  194. //没有配置通道返回失败
  195. if(sample_in_buffer == 0)return ADC_ERR_READ_NO_CHANNEL;
  196. errCode = nrf_drv_saadc_sample();
  197. if(errCode != NRF_SUCCESS)return ADC_ERR_READ_FAIL;
  198. //等待采集
  199. while(!adc_SampleOk)
  200. {
  201. if(wait_time_out--){
  202. // nrf_pwr_mgmt_run();
  203. }
  204. else{
  205. return ADC_ERR_READ_TIMEOUT;
  206. }
  207. }
  208. //预先排序,采集时填充顺序为,通道编号小的先填充。
  209. for(i=0;i<CHANNEL_MAX;i++)
  210. {
  211. if(channelConfig[i].pin_p != NRF_SAADC_INPUT_DISABLED){
  212. adc_sort[sort_index] = i;
  213. sort_index++;
  214. }
  215. }
  216. //获取数据
  217. for(i=0;i<sample_in_buffer;i++)
  218. {
  219. if(adc_sort[i] == channel)
  220. {
  221. *p_adc_value = s_bufferPool[i];
  222. }
  223. }
  224. return ADC_OP_SUCCESS;
  225. }
  226. /**
  227. @brief 开启ADC,与初始化没有区别,为了与Disable成对出现
  228. @param 无
  229. @return 无
  230. */
  231. void ADC_Enable(void)
  232. {
  233. ADC_Init();
  234. }
  235. /**
  236. @brief 禁用ADC
  237. @param 无
  238. @return 无
  239. */
  240. void ADC_Disable(void)
  241. {
  242. nrf_drv_saadc_uninit();
  243. }