diff options
Diffstat (limited to 'ports/rp2/rp2_flash.c')
| -rw-r--r-- | ports/rp2/rp2_flash.c | 18 |
1 files changed, 15 insertions, 3 deletions
diff --git a/ports/rp2/rp2_flash.c b/ports/rp2/rp2_flash.c index a9beabf051..d6b9e13653 100644 --- a/ports/rp2/rp2_flash.c +++ b/ports/rp2/rp2_flash.c @@ -49,6 +49,19 @@ static_assert(MICROPY_HW_ROMFS_BYTES % 4096 == 0, "ROMFS size must be a multiple of 4K"); static_assert(MICROPY_HW_FLASH_STORAGE_BYTES % 4096 == 0, "Flash storage size must be a multiple of 4K"); +#ifndef MICROPY_HW_FLASH_MAX_FREQ +// Emulate Pico SDK's SYS_CLK_HZ / PICO_FLASH_SPI_CLKDIV behaviour by default. +// On RP2040 if PICO_USE_FASTEST_SUPPORTED_CLOCK is set then SYS_CLK_HZ can be +// 200MHz, potentially putting timings derived from PICO_FLASH_SPI_CLKDIV +// out of range. +#ifdef PICO_FLASH_SPI_CLKDIV +#define MICROPY_HW_FLASH_MAX_FREQ (SYS_CLK_HZ / PICO_FLASH_SPI_CLKDIV) +#else +// A default PICO_FLASH_SPI_CLKDIV of 4 is set in boot2_generic_03h.S +#define MICROPY_HW_FLASH_MAX_FREQ (SYS_CLK_HZ / 4) +#endif +#endif + #ifndef MICROPY_HW_FLASH_STORAGE_BASE #define MICROPY_HW_FLASH_STORAGE_BASE (PICO_FLASH_SIZE_BYTES - MICROPY_HW_FLASH_STORAGE_BYTES) #endif @@ -104,9 +117,8 @@ static bool use_multicore_lockout(void) { // and core1 locked out if relevant. static void __no_inline_not_in_flash_func(rp2_flash_set_timing_internal)(int clock_hz) { - // Use the minimum divisor assuming a 133MHz flash. - const int max_flash_freq = 133000000; - int divisor = (clock_hz + max_flash_freq - 1) / max_flash_freq; + // Use the minimum divisor based upon our target MICROPY_HW_FLASH_MAX_FREQ + int divisor = (clock_hz + MICROPY_HW_FLASH_MAX_FREQ - 1) / MICROPY_HW_FLASH_MAX_FREQ; #if PICO_RP2350 // Make sure flash is deselected - QMI doesn't appear to have a busy flag(!) |