From 261a2e7e8bfd6f7234f9b4a63a7f029656263165 Mon Sep 17 00:00:00 2001
From: Giovanni Di Sirio <gdisirio@gmail.com>
Date: Sat, 2 May 2015 12:28:09 +0000
Subject: git-svn-id: svn://svn.code.sf.net/p/chibios/svn/trunk@7936
 35acf78f-673a-0410-8e92-d51de3d6d3f4

---
 testhal/STM32/STM32F4xx/DAC/main.c | 88 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 88 insertions(+)

(limited to 'testhal/STM32/STM32F4xx/DAC/main.c')

diff --git a/testhal/STM32/STM32F4xx/DAC/main.c b/testhal/STM32/STM32F4xx/DAC/main.c
index 8049ce958..7371cbb2d 100644
--- a/testhal/STM32/STM32F4xx/DAC/main.c
+++ b/testhal/STM32/STM32F4xx/DAC/main.c
@@ -17,6 +17,79 @@
 #include "ch.h"
 #include "hal.h"
 
+#define DAC_BUFFER_SIZE 360
+
+/*
+ * DAC test buffer (sine wave).
+ */
+static const dacsample_t dac_buffer[DAC_BUFFER_SIZE] = {
+  2047, 2082, 2118, 2154, 2189, 2225, 2260, 2296, 2331, 2367, 2402, 2437,
+  2472, 2507, 2542, 2576, 2611, 2645, 2679, 2713, 2747, 2780, 2813, 2846,
+  2879, 2912, 2944, 2976, 3008, 3039, 3070, 3101, 3131, 3161, 3191, 3221,
+  3250, 3278, 3307, 3335, 3362, 3389, 3416, 3443, 3468, 3494, 3519, 3544,
+  3568, 3591, 3615, 3637, 3660, 3681, 3703, 3723, 3744, 3763, 3782, 3801,
+  3819, 3837, 3854, 3870, 3886, 3902, 3917, 3931, 3944, 3958, 3970, 3982,
+  3993, 4004, 4014, 4024, 4033, 4041, 4049, 4056, 4062, 4068, 4074, 4078,
+  4082, 4086, 4089, 4091, 4092, 4093, 4094, 4093, 4092, 4091, 4089, 4086,
+  4082, 4078, 4074, 4068, 4062, 4056, 4049, 4041, 4033, 4024, 4014, 4004,
+  3993, 3982, 3970, 3958, 3944, 3931, 3917, 3902, 3886, 3870, 3854, 3837,
+  3819, 3801, 3782, 3763, 3744, 3723, 3703, 3681, 3660, 3637, 3615, 3591,
+  3568, 3544, 3519, 3494, 3468, 3443, 3416, 3389, 3362, 3335, 3307, 3278,
+  3250, 3221, 3191, 3161, 3131, 3101, 3070, 3039, 3008, 2976, 2944, 2912,
+  2879, 2846, 2813, 2780, 2747, 2713, 2679, 2645, 2611, 2576, 2542, 2507,
+  2472, 2437, 2402, 2367, 2331, 2296, 2260, 2225, 2189, 2154, 2118, 2082,
+  2047, 2012, 1976, 1940, 1905, 1869, 1834, 1798, 1763, 1727, 1692, 1657,
+  1622, 1587, 1552, 1518, 1483, 1449, 1415, 1381, 1347, 1314, 1281, 1248,
+  1215, 1182, 1150, 1118, 1086, 1055, 1024,  993,  963,  933,  903,  873,
+   844,  816,  787,  759,  732,  705,  678,  651,  626,  600,  575,  550,
+   526,  503,  479,  457,  434,  413,  391,  371,  350,  331,  312,  293,
+   275,  257,  240,  224,  208,  192,  177,  163,  150,  136,  124,  112,
+   101,   90,   80,   70,   61,   53,   45,   38,   32,   26,   20,   16,
+    12,    8,    5,    3,    2,    1,    0,    1,    2,    3,    5,    8,
+    12,   16,   20,   26,   32,   38,   45,   53,   61,   70,   80,   90,
+   101,  112,  124,  136,  150,  163,  177,  192,  208,  224,  240,  257,
+   275,  293,  312,  331,  350,  371,  391,  413,  434,  457,  479,  503,
+   526,  550,  575,  600,  626,  651,  678,  705,  732,  759,  787,  816,
+   844,  873,  903,  933,  963,  993, 1024, 1055, 1086, 1118, 1150, 1182,
+  1215, 1248, 1281, 1314, 1347, 1381, 1415, 1449, 1483, 1518, 1552, 1587,
+  1622, 1657, 1692, 1727, 1763, 1798, 1834, 1869, 1905, 1940, 1976, 2012
+};
+
+/*
+ * DAC streaming callback.
+ */
+size_t nx = 0, ny = 0;
+static void end_cb1(DACDriver *dacp, const dacsample_t *buffer, size_t n) {
+
+  (void)dacp;
+
+  if (dac_buffer == buffer) {
+    nx += n;
+  }
+  else {
+    ny += n;
+  }
+}
+
+/*
+ * DAC error callback.
+ */
+static void error_cb1(DACDriver *dacp, dacerror_t err) {
+
+  (void)dacp;
+  (void)err;
+
+  chSysHalt("DAC failure");
+}
+
+static const DACConversionGroup daccfg1 = {
+  num_channels: 1,
+  end_cb:       end_cb1,
+  error_cb:     error_cb1,
+  datamode:     DAC_DHRM_12BIT_RIGHT,
+  trigger:      DAC_TRG(0)
+};
+
 /*
  * Application entry point.
  */
@@ -32,11 +105,26 @@ int main(void) {
   halInit();
   chSysInit();
 
+  /*
+   * Starting DAC driver, setting up the output pin as analog as suggested
+   * by the Reference Manual.
+   */
+  palSetPadMode(GPIOA, 4, PAL_MODE_INPUT_ANALOG);
+  dacStart(&DACD1, NULL);
+
+  /*
+   * Starting a continous conversion.
+   */
+  dacStartConversion(&DACD1, &daccfg1, dac_buffer, DAC_BUFFER_SIZE);
+
   /*
    * Normal main() thread activity, if the button is pressed then the I2s
    * transfer is stopped.
    */
   while (true) {
+    if (palReadPad(GPIOA, GPIOA_BUTTON)) {
+      dacStopConversion(&DACD1);
+    }
     chThdSleepMilliseconds(500);
   }
   return 0;
-- 
cgit v1.2.3