Added Tiva TM4C123x GPT, I2C and PWM examples to the testhal.

1 files changed, 137 insertions, 0 deletions

diff --git a/testhal/TIVA/TM4C123x/PWM/main.c b/testhal/TIVA/TM4C123x/PWM/main.c
new file mode 100644
index 0000000..252ad5e
--- /dev/null
+++ b/testhal/TIVA/TM4C123x/PWM/main.c
@@ -0,0 +1,137 @@
+/*
+    Copyright (C) 2014 Marco Veeneman
+
+    Licensed under the Apache License, Version 2.0 (the "License");
+    you may not use this file except in compliance with the License.
+    You may obtain a copy of the License at
+
+        http://www.apache.org/licenses/LICENSE-2.0
+
+    Unless required by applicable law or agreed to in writing, software
+    distributed under the License is distributed on an "AS IS" BASIS,
+    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+    See the License for the specific language governing permissions and
+    limitations under the License.
+*/
+
+#include "ch.h"
+#include "hal.h"
+
+static void pwmpcb(PWMDriver *pwmp)
+{
+  (void)pwmp;
+  palClearPad(GPIOF, GPIOF_LED_RED);
+  palClearPad(GPIOF, GPIOF_LED_GREEN);
+  palClearPad(GPIOF, GPIOF_LED_BLUE);
+}
+
+static void pwmc1cb0(PWMDriver *pwmp)
+{
+  (void)pwmp;
+  palSetPad(GPIOF, GPIOF_LED_RED);
+}
+
+static void pwmc1cb1(PWMDriver *pwmp)
+{
+  (void)pwmp;
+  palSetPad(GPIOF, GPIOF_LED_GREEN);
+}
+
+static void pwmc1cb2(PWMDriver *pwmp)
+{
+  (void)pwmp;
+  palSetPad(GPIOF, GPIOF_LED_BLUE);
+}
+
+static PWMConfig pwmcfg = {
+  10000,                                    /* 10kHz PWM clock frequency.*/
+  10000,                                    /* Initial PWM period 1S.*/
+  pwmpcb,
+  {
+   {PWM_OUTPUT_DISABLED, pwmc1cb0},
+   {PWM_OUTPUT_DISABLED, pwmc1cb1},
+   {PWM_OUTPUT_DISABLED, pwmc1cb2},
+   {PWM_OUTPUT_DISABLED, NULL},
+   {PWM_OUTPUT_DISABLED, NULL},
+   {PWM_OUTPUT_DISABLED, NULL},
+   {PWM_OUTPUT_DISABLED, NULL},
+   {PWM_OUTPUT_DISABLED, NULL}
+  }
+};
+
+/*
+ * Application entry point.
+ */
+int main(void)
+{
+  /*
+   * System initializations.
+   * - HAL initialization, this also initializes the configured device drivers
+   *   and performs the board-specific initializations.
+   * - Kernel initialization, the main() function becomes a thread and the
+   *   RTOS is active.
+   */
+  halInit();
+  chSysInit();
+
+  /*
+   * Start PWM driver
+   */
+  pwmStart(&PWMD1, &pwmcfg);
+
+  pwmEnableChannel(&PWMD1, 0, 0);
+  pwmEnableChannel(&PWMD1, 1, 0);
+  pwmEnableChannel(&PWMD1, 2, 0);
+  pwmEnableChannelNotification(&PWMD1, 0);
+  pwmEnableChannelNotification(&PWMD1, 1);
+  pwmEnableChannelNotification(&PWMD1, 2);
+  pwmEnablePeriodicNotification(&PWMD1);
+
+  /*
+   * Normal main() thread activity
+   */
+  while (TRUE) {
+    uint16_t rgbColour[3];
+    uint8_t decColour;
+    uint16_t i;
+
+    // Start off with red.
+    rgbColour[0] = pwmcfg.frequency - 2;
+    rgbColour[1] = 0;
+    rgbColour[2] = 0;
+
+    // Choose the colours to increment and decrement.
+    for (decColour = 0; decColour < 3; decColour++) {
+      int incColour = decColour == 2 ? 0 : decColour + 1;
+
+      // cross-fade the two colours.
+      for(i = 0; i < pwmcfg.frequency - 2; i++) {
+        rgbColour[decColour] -= 1;
+        rgbColour[incColour] += 1;
+
+        if (!palReadPad(GPIOF, GPIOF_SW1))
+        {
+          pwmEnableChannel(&PWMD1, 0, 0);
+          pwmEnableChannel(&PWMD1, 1, 1);
+          pwmEnableChannel(&PWMD1, 2, 2);
+        }
+        else if (!palReadPad(GPIOF, GPIOF_SW2))
+        {
+          pwmEnableChannel(&PWMD1, 0, pwmcfg.frequency - 2);
+          pwmEnableChannel(&PWMD1, 1, pwmcfg.frequency - 1);
+          pwmEnableChannel(&PWMD1, 2, pwmcfg.frequency);
+        }
+        else
+        {
+          pwmEnableChannel(&PWMD1, 0, rgbColour[0]);
+          pwmEnableChannel(&PWMD1, 1, rgbColour[1]);
+          pwmEnableChannel(&PWMD1, 2, rgbColour[2]);
+        }
+
+        chThdSleepMilliseconds(1);
+      }
+    }
+  }
+  
+  return 0;
+}