armcm_timer: Unify udelay() implementation
Move the udelay() code from various arm board directories into the src/generic/armcm_timer.c code. Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
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@ -54,6 +54,20 @@ timer_kick(void)
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SCB->ICSR = SCB_ICSR_PENDSTSET_Msk;
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}
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// Implement simple early-boot delay mechanism
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void
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udelay(uint32_t usecs)
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{
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if (!(CoreDebug->DEMCR & CoreDebug_DEMCR_TRCENA_Msk)) {
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CoreDebug->DEMCR |= CoreDebug_DEMCR_TRCENA_Msk;
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DWT->CTRL |= DWT_CTRL_CYCCNTENA_Msk;
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}
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uint32_t end = timer_read_time() + timer_from_us(usecs);
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while (timer_is_before(timer_read_time(), end))
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;
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}
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void
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timer_init(void)
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{
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@ -0,0 +1,8 @@
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#ifndef __GENERIC_ARMCM_TIMER_H
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#define __GENERIC_ARMCM_TIMER_H
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#include <stdint.h> // uint32_t
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void udelay(uint32_t usecs);
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#endif // serial_irq.h
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@ -18,6 +18,4 @@ int is_enabled_pclock(uint32_t pclk);
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void enable_pclock(uint32_t pclk);
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void gpio_peripheral(uint32_t gpio, int func, int pullup);
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void udelay(uint32_t usecs);
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#endif // internal.h
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@ -67,20 +67,6 @@ command_reset(uint32_t *args)
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}
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DECL_COMMAND_FLAGS(command_reset, HF_IN_SHUTDOWN, "reset");
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// Implement simple early-boot delay mechanism
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void
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udelay(uint32_t usecs)
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{
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if (!(CoreDebug->DEMCR & CoreDebug_DEMCR_TRCENA_Msk)) {
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CoreDebug->DEMCR |= CoreDebug_DEMCR_TRCENA_Msk;
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DWT->CTRL |= DWT_CTRL_CYCCNTENA_Msk;
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}
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uint32_t end = timer_read_time() + timer_from_us(usecs);
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while (timer_is_before(timer_read_time(), end))
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;
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}
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// Main entry point
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int
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main(void)
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@ -7,6 +7,7 @@
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#include <string.h> // memcpy
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#include "LPC17xx.h" // LPC_SC
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#include "autoconf.h" // CONFIG_SMOOTHIEWARE_BOOTLOADER
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#include "board/armcm_timer.h" // udelay
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#include "board/irq.h" // irq_disable
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#include "board/misc.h" // timer_read_time
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#include "byteorder.h" // cpu_to_le32
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@ -9,7 +9,6 @@
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extern uint8_t const avail_pins[];
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void udelay(uint32_t usecs);
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void gpio_init(void);
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void TimerInit(void);
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@ -84,15 +84,6 @@ void clock_config(void)
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HAL_RCCEx_PeriphCLKConfig(&PeriphClkInit);
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}
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// Implement simple early-boot delay mechanism
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void
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udelay(uint32_t usecs)
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{
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uint32_t end = timer_read_time() + timer_from_us(usecs);
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while (timer_is_before(timer_read_time(), end))
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;
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}
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void
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watchdog_reset(void)
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{
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@ -10,6 +10,4 @@
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extern GPIO_TypeDef *const digital_regs[];
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extern uint32_t const digital_pins[];
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void udelay(uint32_t usecs);
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#endif // internal.h
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@ -131,20 +131,6 @@ void io_config(void)
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LL_DBGMCU_SetTracePinAssignment(LL_DBGMCU_TRACE_NONE);
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}
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// Implement simple early-boot delay mechanism
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void
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udelay(uint32_t usecs)
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{
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if (!(CoreDebug->DEMCR & CoreDebug_DEMCR_TRCENA_Msk)) {
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CoreDebug->DEMCR |= CoreDebug_DEMCR_TRCENA_Msk;
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DWT->CTRL |= DWT_CTRL_CYCCNTENA_Msk;
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}
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uint32_t end = timer_read_time() + timer_from_us(usecs);
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while (timer_is_before(timer_read_time(), end))
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;
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}
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// Main entry point
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int
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main(void)
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@ -6,6 +6,7 @@
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#include <string.h> // NULL
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#include "autoconf.h" // CONFIG_STM_FLASH_START_2000
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#include "board/armcm_timer.h" // udelay
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#include "board/gpio.h" // gpio_out_setup
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#include "board/io.h" // writeb
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#include "board/irq.h" // irq_disable
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