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last commit for glasser code

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This commit is contained in:
Jack Humbert 2018-05-23 00:50:58 -04:00
parent 3e282ab203
commit d233737c95
6 changed files with 33 additions and 21 deletions
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23
drivers/arm/ws2812.c
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@ -41,6 +41,7 @@
#if !defined(WS2812_TIM_N)
#error WS2812 timer not specified
#endif
// values for these might be found in table 14 in DM00058181 (STM32F303)
#if defined(STM32F2XX) || defined(STM32F3XX) || defined(STM32F4XX) || defined(STM32F7XX)
#if WS2812_TIM_N <= 2
#define WS2812_AF 1
@ -61,8 +62,10 @@
/* --- PRIVATE CONSTANTS ---------------------------------------------------- */
#define WS2812_PWM_FREQUENCY (STM32_SYSCLK/2) /**< Clock frequency of PWM */
#define WS2812_PWM_PERIOD (WS2812_PWM_FREQUENCY/800000) /**< Clock period in ticks. 90/(72 MHz) = 1.25 uS (as per datasheet) */
//#define WS2812_PWM_FREQUENCY (STM32_SYSCLK/2) /**< Clock frequency of PWM */
#define WS2812_PWM_FREQUENCY (72000000) /**< Clock frequency of PWM */
//#define WS2812_PWM_PERIOD (WS2812_PWM_FREQUENCY/800000) /**< Clock period in ticks. 90/(72 MHz) = 1.25 uS (as per datasheet) */
#define WS2812_PWM_PERIOD (90) /**< Clock period in ticks. 90/(72 MHz) = 1.25 uS (as per datasheet) */
/**
* @brief Number of bit-periods to hold the data line low at the end of a frame
@ -86,7 +89,8 @@
* a low period of (90 - 22)/(72 MHz) = 9.44 uS. These values are within the allowable
* bounds, and intentionally skewed as far to the low duty-cycle side as possible
*/
#define WS2812_DUTYCYCLE_0 (WS2812_PWM_FREQUENCY/(1000000000/350))
//#define WS2812_DUTYCYCLE_0 (WS2812_PWM_FREQUENCY/(1000000000/350))
#define WS2812_DUTYCYCLE_0 (22)
/**
* @brief High period for a one, in ticks
@ -99,7 +103,8 @@
* a low period of (90 - 56)/(72 MHz) = 4.72 uS. These values are within the allowable
* bounds, and intentionally skewed as far to the high duty-cycle side as possible
*/
#define WS2812_DUTYCYCLE_1 (WS2812_PWM_FREQUENCY/(1000000000/800))
//#define WS2812_DUTYCYCLE_1 (WS2812_PWM_FREQUENCY/(1000000000/800))
#define WS2812_DUTYCYCLE_1 (56)
/* --- PRIVATE MACROS ------------------------------------------------------- */
@ -175,11 +180,11 @@ void ws2812_init(void)
for (i = 0; i < WS2812_RESET_BIT_N; i++) ws2812_frame_buffer[i + WS2812_COLOR_BIT_N] = 0; // All reset bits are zero
// Configure PA1 as AF output
#ifdef WS2812_EXTERNAL_PULLUP
palSetPadMode(PORT_WS2812, PIN_WS2812, PAL_MODE_ALTERNATE(WS2812_AF) | PAL_STM32_OTYPE_OPENDRAIN);
#else
palSetPadMode(PORT_WS2812, PIN_WS2812, PAL_MODE_ALTERNATE(WS2812_AF));
#endif
//#ifdef WS2812_EXTERNAL_PULLUP
// palSetPadMode(PORT_WS2812, PIN_WS2812, PAL_MODE_ALTERNATE(WS2812_AF) | PAL_STM32_OTYPE_OPENDRAIN);
//#else
palSetPadMode(PORT_WS2812, PIN_WS2812, PAL_MODE_ALTERNATE(1));
//#endif
// PWM Configuration
#pragma GCC diagnostic ignored "-Woverride-init" // Turn off override-init warning for this struct. We use the overriding ability to set a "default" channel config