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fw: Remove use of timer in flash operations

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Since we want to keep the user of the timer to the device apps, remove
the use of the timer for implementing a delay when writing to flash.
Let's try without any delay what so ever, just busylooping the query
to the chip.
This commit is contained in:
Michael Cardell Widerkrantz 2025-04-29 20:32:55 +02:00
parent 4f4de4a07d
commit d83d659284
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GPG key ID: D3DB3DDF57E704E5
1 changed files with 2 additions and 27 deletions
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29
hw/application_fpga/fw/tk1/flash.c
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@ -10,36 +10,12 @@
#include "flash.h" #include "flash.h"
#include "spi.h" #include "spi.h"
// clang-format off
static volatile uint32_t *timer = (volatile uint32_t *)TK1_MMIO_TIMER_TIMER;
static volatile uint32_t *timer_prescaler = (volatile uint32_t *)TK1_MMIO_TIMER_PRESCALER;
static volatile uint32_t *timer_status = (volatile uint32_t *)TK1_MMIO_TIMER_STATUS;
static volatile uint32_t *timer_ctrl = (volatile uint32_t *)TK1_MMIO_TIMER_CTRL;
// clang-format on
// CPU clock frequency in Hz
#define CPUFREQ 24000000
#define PAGE_SIZE 256 #define PAGE_SIZE 256
static bool flash_is_busy(void); static bool flash_is_busy(void);
static void flash_wait_busy(void); static void flash_wait_busy(void);
static void flash_write_enable(void); static void flash_write_enable(void);
static void delay(int timeout_ms)
{
// Tick once every centisecond
*timer_prescaler = CPUFREQ / 100;
*timer = timeout_ms / 10;
*timer_ctrl |= (1 << TK1_MMIO_TIMER_CTRL_START_BIT);
while (*timer_status != 0) {
}
// Stop timer
*timer_ctrl |= (1 << TK1_MMIO_TIMER_CTRL_STOP_BIT);
}
static bool flash_is_busy(void) static bool flash_is_busy(void)
{ {
uint8_t tx_buf = READ_STATUS_REG_1; uint8_t tx_buf = READ_STATUS_REG_1;
@ -58,9 +34,8 @@ static bool flash_is_busy(void)
// Blocking until !busy // Blocking until !busy
static void flash_wait_busy(void) static void flash_wait_busy(void)
{ {
while (flash_is_busy()) { while (flash_is_busy())
delay(10); ;
}
} }
static void flash_write_enable(void) static void flash_write_enable(void)