Intelligent Systems
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mbed-src
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Diff: targets/hal/TARGET_STM/TARGET_DISCO_F407VG/pwmout_api.c
- Revision:
- 242:7074e42da0b2
- Parent:
- 227:7bd0639b8911
- Child:
- 250:a49055e7a707
--- a/targets/hal/TARGET_STM/TARGET_DISCO_F407VG/pwmout_api.c Thu Jun 26 10:30:09 2014 +0100
+++ b/targets/hal/TARGET_STM/TARGET_DISCO_F407VG/pwmout_api.c Fri Jun 27 07:30:09 2014 +0100
@@ -27,30 +27,30 @@
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*******************************************************************************
*/
-#include "mbed_assert.h"
#include "pwmout_api.h"
+#if DEVICE_PWMOUT
+
#include "cmsis.h"
#include "pinmap.h"
#include "error.h"
-#include "stm32f4xx_hal.h"
// TIM5 cannot be used because already used by the us_ticker
static const PinMap PinMap_PWM[] = {
{PA_0, PWM_2, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF1_TIM2)}, // TIM2_CH1
- //{PA_0, PWM_5, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF2_TIM5)}, // TIM5_CH1
+// {PA_0, PWM_5, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF2_TIM5)}, // TIM5_CH1
{PA_1, PWM_2, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF1_TIM2)}, // TIM2_CH2
- //{PA_1, PWM_5, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF2_TIM5)}, // TIM5_CH2
+// {PA_1, PWM_5, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF2_TIM5)}, // TIM5_CH2
{PA_2, PWM_2, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF1_TIM2)}, // TIM2_CH3
- //{PA_2, PWM_5, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF2_TIM5)}, // TIM5_CH3
- //{PA_2, PWM_9, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF3_TIM9)}, // TIM9_CH1
+// {PA_2, PWM_5, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF2_TIM5)}, // TIM5_CH3
+// {PA_2, PWM_9, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF3_TIM9)}, // TIM9_CH1
{PA_3, PWM_2, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF1_TIM2)}, // TIM2_CH4
- //{PA_3, PWM_5, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF2_TIM5)}, // TIM5_CH4
- //{PA_3, PWM_9, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF3_TIM9)}, // TIM9_CH2
+// {PA_3, PWM_5, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF2_TIM5)}, // TIM5_CH4
+// {PA_3, PWM_9, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF3_TIM9)}, // TIM9_CH2
{PA_5, PWM_2, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF1_TIM2)}, // TIM2_CH1
{PA_6, PWM_3, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF2_TIM3)}, // TIM3_CH1
{PA_7, PWM_1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF1_TIM1)}, // TIM1_CH1N
- //{PA_7, PWM_3, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF2_TIM3)}, // TIM3_CH2
+// {PA_7, PWM_3, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF2_TIM3)}, // TIM3_CH2
{PA_8, PWM_1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF1_TIM1)}, // TIM1_CH1
{PA_9, PWM_1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF1_TIM1)}, // TIM1_CH2
{PA_10, PWM_1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF1_TIM1)}, // TIM1_CH3
@@ -58,18 +58,18 @@
{PA_15, PWM_2, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF1_TIM2)}, // TIM2_CH1
{PB_0, PWM_1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF1_TIM1)}, // TIM1_CH2N
- //{PB_0, PWM_3, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF2_TIM3)}, // TIM3_CH3
+// {PB_0, PWM_3, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF2_TIM3)}, // TIM3_CH3
{PB_1, PWM_1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF1_TIM1)}, // TIM1_CH3N
- //{PB_1, PWM_3, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF2_TIM3)}, // TIM3_CH4
+// {PB_1, PWM_3, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF2_TIM3)}, // TIM3_CH4
{PB_3, PWM_2, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF1_TIM2)}, // TIM2_CH2
{PB_4, PWM_3, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF2_TIM3)}, // TIM3_CH1
{PB_5, PWM_3, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF2_TIM3)}, // TIM3_CH2
{PB_6, PWM_4, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF2_TIM4)}, // TIM4_CH1
{PB_7, PWM_4, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF2_TIM4)}, // TIM4_CH2
{PB_8, PWM_4, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF2_TIM4)}, // TIM4_CH3
- //{PB_8, PWM_10,STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF3_TIM10)}, // TIM10_CH1
+// {PB_8, PWM_10,STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF3_TIM10)}, // TIM10_CH1
{PB_9, PWM_4, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF2_TIM4)}, // TIM4_CH4
- //{PB_9, PWM_11,STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF3_TIM11)}, // TIM11_CH1
+// {PB_9, PWM_11,STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF3_TIM11)}, // TIM11_CH1
{PB_10, PWM_2, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF1_TIM2)}, // TIM2_CH3
{PB_13, PWM_1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF1_TIM1)}, // TIM1_CH1N
{PB_14, PWM_1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF1_TIM1)}, // TIM1_CH2N
@@ -84,20 +84,50 @@
};
static TIM_HandleTypeDef TimHandle;
+static uint8_t ClockDivider;
+/* 0, 1, 2, 3, 4, 5, 6, 7 */
+const uint8_t APBxPrescTable[]={ 0, 0, 0, 0, 1, 2, 3, 4 };
+extern const uint8_t AHBPrescTable[];
void pwmout_init(pwmout_t* obj, PinName pin) {
// Get the peripheral name from the pin and assign it to the object
obj->pwm = (PWMName)pinmap_peripheral(pin, PinMap_PWM);
- MBED_ASSERT(obj->pwm != (PWMName)NC);
+
+ if (obj->pwm == (PWMName)NC) {
+ error("PWM error: pinout mapping failed.");
+ }
// Enable TIM clock
- if (obj->pwm == PWM_1) __TIM1_CLK_ENABLE();
+ /* APB1 Timers */
if (obj->pwm == PWM_2) __TIM2_CLK_ENABLE();
if (obj->pwm == PWM_3) __TIM3_CLK_ENABLE();
if (obj->pwm == PWM_4) __TIM4_CLK_ENABLE();
- if (obj->pwm == PWM_9) __TIM9_CLK_ENABLE();
+ /* APB2 Timers */
+ if (obj->pwm == PWM_1) __TIM1_CLK_ENABLE();
+ if (obj->pwm == PWM_9) __TIM9_CLK_ENABLE();
if (obj->pwm == PWM_10) __TIM10_CLK_ENABLE();
if (obj->pwm == PWM_11) __TIM11_CLK_ENABLE();
+ /* Decide APBx divider for timer base clock
+ * Auto detect the Clockdivider value according to AHB,APB1 and APB2 prescaler register.
+ */
+ ClockDivider = AHBPrescTable[ ( ( RCC->CFGR & RCC_CFGR_HPRE ) >> 4 ) ];
+ switch( obj->pwm ) {
+ /* APB1 low clock */
+ case PWM_2:
+ case PWM_3:
+ case PWM_4:
+ ClockDivider += APBxPrescTable[ ( (RCC->CFGR & RCC_CFGR_PPRE1 ) >> 13 ) ];
+ break;
+ /* APB2 fast clock */
+ case PWM_1:
+ case PWM_9:
+ case PWM_10:
+ case PWM_11:
+ ClockDivider += APBxPrescTable[ ( (RCC->CFGR & RCC_CFGR_PPRE2 ) >> 10 ) ];
+ break;
+ default:
+ break;
+ }
// Configure GPIO
pinmap_pinout(pin, PinMap_PWM);
@@ -110,10 +140,7 @@
}
void pwmout_free(pwmout_t* obj) {
- TimHandle.Instance = (TIM_TypeDef *)(obj->pwm);
-
- HAL_TIM_PWM_DeInit(&TimHandle);
-
+ // Configure GPIO
pin_function(obj->pin, STM_PIN_DATA(STM_MODE_INPUT, GPIO_NOPULL, 0));
}
@@ -144,15 +171,12 @@
switch (obj->pin) {
// Channels 1
case PA_0:
- //case PA_2:
case PA_5:
case PA_6:
case PA_8:
case PA_15:
case PB_4:
case PB_6:
- //case PB_8:
- //case PB_9:
case PC_6:
channel = TIM_CHANNEL_1;
break;
@@ -164,8 +188,6 @@
break;
// Channels 2
case PA_1:
- //case PA_3:
- //case PA_7:
case PA_9:
case PB_3:
case PB_5:
@@ -181,13 +203,10 @@
break;
// Channels 3
case PA_2:
- //case PA_3:
case PA_10:
- //case PB_0:
case PB_8:
case PB_10:
case PC_8:
- //case PC_9:
channel = TIM_CHANNEL_3;
break;
// Channels 3N
@@ -199,7 +218,6 @@
// Channels 4
case PA_3:
case PA_11:
- //case PB_1:
case PB_9:
case PC_9:
channel = TIM_CHANNEL_4;
@@ -211,8 +229,7 @@
HAL_TIM_PWM_ConfigChannel(&TimHandle, &sConfig, channel);
if (complementary_channel) {
HAL_TIMEx_PWMN_Start(&TimHandle, channel);
- }
- else {
+ } else {
HAL_TIM_PWM_Start(&TimHandle, channel);
}
}
@@ -240,8 +257,10 @@
__HAL_TIM_DISABLE(&TimHandle);
+ // Update the SystemCoreClock variable
+ SystemCoreClockUpdate();
TimHandle.Init.Period = us - 1;
- TimHandle.Init.Prescaler = (uint16_t)(SystemCoreClock / 2 / 1000000) - 1; // 1 µs tick
+ TimHandle.Init.Prescaler = (uint16_t)( ( SystemCoreClock >> ClockDivider ) / 1000000) - 1; // 1 µs tick
TimHandle.Init.ClockDivision = 0;
TimHandle.Init.CounterMode = TIM_COUNTERMODE_UP;
HAL_TIM_PWM_Init(&TimHandle);
@@ -267,3 +286,5 @@
float value = (float)us / (float)obj->period;
pwmout_write(obj, value);
}
+
+#endif