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sram-overlay.c
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sram-overlay.c
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/* Copyright 2023 Dual Tachyon
* https://github.com/DualTachyon
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "ARMCM0.h"
#include "bsp/dp32g030/pmu.h"
#include "bsp/dp32g030/saradc.h"
#include "bsp/dp32g030/syscon.h"
#include "sram-overlay.h"
static volatile uint32_t *pFlash = 0;
uint32_t overlay_FLASH_MainClock;
uint32_t overlay_FLASH_ClockMultiplier;
uint32_t overlay_0x20000478; // Nothing is using this???
void overlay_FLASH_RebootToBootloader(void)
{
overlay_FLASH_MaskUnlock();
overlay_FLASH_SetMaskSel(FLASH_MASK_SELECTION_NONE);
overlay_FLASH_MaskLock();
overlay_SystemReset();
}
bool overlay_FLASH_IsBusy(void)
{
return (FLASH_ST & FLASH_ST_BUSY_MASK) != FLASH_ST_BUSY_BITS_READY;
}
bool overlay_FLASH_IsInitComplete(void)
{
return (FLASH_ST & FLASH_ST_INIT_BUSY_MASK) == FLASH_ST_INIT_BUSY_BITS_COMPLETE;
}
void overlay_FLASH_Start(void)
{
overlay_FLASH_Unlock();
FLASH_START |= FLASH_START_START_BITS_START;
}
void overlay_FLASH_Init(FLASH_READ_MODE ReadMode)
{
overlay_FLASH_WakeFromDeepSleep();
overlay_FLASH_SetMode(FLASH_MODE_READ_AHB);
overlay_FLASH_SetReadMode(ReadMode);
overlay_FLASH_SetEraseTime();
overlay_FLASH_SetProgramTime();
overlay_FLASH_Lock();
}
void overlay_FLASH_MaskLock(void)
{
FLASH_MASK = (FLASH_MASK & ~FLASH_MASK_LOCK_MASK) | FLASH_MASK_LOCK_BITS_SET;
}
void overlay_FLASH_SetMaskSel(FLASH_MASK_SELECTION Mask)
{
FLASH_MASK = (FLASH_MASK & ~FLASH_MASK_SEL_MASK) | ((Mask << FLASH_MASK_SEL_SHIFT) & FLASH_MASK_SEL_MASK);
}
void overlay_FLASH_MaskUnlock(void)
{
FLASH_MASK = (FLASH_MASK & ~FLASH_MASK_LOCK_MASK) | FLASH_MASK_LOCK_BITS_NOT_SET;
}
void overlay_FLASH_Lock(void)
{
FLASH_LOCK = FLASH_LOCK_LOCK_BITS_LOCK;
}
void overlay_FLASH_Unlock(void)
{
FLASH_UNLOCK = FLASH_UNLOCK_UNLOCK_BITS_UNLOCK;
}
uint32_t overlay_FLASH_ReadByAHB(uint32_t Offset)
{
return pFlash[(Offset & ~3U) / 4];
}
uint32_t overlay_FLASH_ReadByAPB(uint32_t Offset)
{
uint32_t Data;
while (overlay_FLASH_IsBusy()) {
}
overlay_FLASH_SetMode(FLASH_MODE_READ_APB);
FLASH_ADDR = Offset >> 2;
overlay_FLASH_Start();
while (overlay_FLASH_IsBusy()) {
}
Data = FLASH_RDATA;
overlay_FLASH_SetMode(FLASH_MODE_READ_AHB);
overlay_FLASH_Lock();
return Data;
}
void overlay_FLASH_SetArea(FLASH_AREA Area)
{
FLASH_CFG = (FLASH_CFG & ~FLASH_CFG_NVR_SEL_MASK) | ((Area << FLASH_CFG_NVR_SEL_SHIFT) & FLASH_CFG_NVR_SEL_MASK);
}
void overlay_FLASH_SetReadMode(FLASH_READ_MODE Mode)
{
if (Mode == FLASH_READ_MODE_1_CYCLE) {
FLASH_CFG = (FLASH_CFG & ~FLASH_CFG_READ_MD_MASK) | FLASH_CFG_READ_MD_BITS_1_CYCLE;
} else if (Mode == FLASH_READ_MODE_2_CYCLE) {
FLASH_CFG = (FLASH_CFG & ~FLASH_CFG_READ_MD_MASK) | FLASH_CFG_READ_MD_BITS_2_CYCLE;
}
}
void overlay_FLASH_SetEraseTime(void)
{
FLASH_ERASETIME = ((overlay_FLASH_ClockMultiplier & 0xFFFFU) * 0x1A00000U) + (overlay_FLASH_ClockMultiplier * 3600U);
}
void overlay_FLASH_WakeFromDeepSleep(void)
{
FLASH_CFG = (FLASH_CFG & ~FLASH_CFG_DEEP_PD_MASK) | FLASH_CFG_DEEP_PD_BITS_NORMAL;
while (!overlay_FLASH_IsInitComplete()) {
}
}
void overlay_FLASH_SetMode(FLASH_MODE Mode)
{
FLASH_CFG = (FLASH_CFG & ~FLASH_CFG_MODE_MASK) | ((Mode << FLASH_CFG_MODE_SHIFT) & FLASH_CFG_MODE_MASK);
}
void overlay_FLASH_SetProgramTime(void)
{
FLASH_PROGTIME = overlay_FLASH_ClockMultiplier * 45074;
}
void overlay_SystemReset(void)
{
// Lifted from core_cm0.h to preserve function order in the object file.
__DSB(); /* Ensure all outstanding memory accesses included
buffered write are completed before reset */
SCB->AIRCR = ((0x5FAUL << SCB_AIRCR_VECTKEY_Pos) |
SCB_AIRCR_SYSRESETREQ_Msk);
__DSB(); /* Ensure completion of memory access */
for(;;) /* wait until reset */
{
__NOP();
}
}
uint32_t overlay_FLASH_ReadNvrWord(uint32_t Offset)
{
uint32_t Data;
overlay_FLASH_SetArea(FLASH_AREA_NVR);
Data = overlay_FLASH_ReadByAHB(Offset);
overlay_FLASH_SetArea(FLASH_AREA_MAIN);
return Data;
}
void overlay_FLASH_ConfigureTrimValues(void)
{
uint32_t Data;
overlay_FLASH_SetArea(FLASH_AREA_NVR);
SYSCON_CHIP_ID0 = overlay_FLASH_ReadByAPB(0xF018);
SYSCON_CHIP_ID1 = overlay_FLASH_ReadByAPB(0xF01C);
SYSCON_CHIP_ID2 = overlay_FLASH_ReadByAPB(0xF020);
SYSCON_CHIP_ID3 = overlay_FLASH_ReadByAPB(0xF024);
SYSCON_RC_FREQ_DELTA = overlay_FLASH_ReadByAHB(0x07C8);
SYSCON_VREF_VOLT_DELTA = overlay_FLASH_ReadByAHB(0x07C4);
PMU_TRIM_POW0 = overlay_FLASH_ReadByAHB(0x07E4);
PMU_TRIM_POW1 = overlay_FLASH_ReadByAHB(0x07E0);
PMU_TRIM_RCHF = overlay_FLASH_ReadByAHB(0x07D8);
PMU_TRIM_RCLF = overlay_FLASH_ReadByAHB(0x07D4);
PMU_TRIM_OPA = overlay_FLASH_ReadByAHB(0x07D0);
PMU_TRIM_PLL = overlay_FLASH_ReadByAHB(0x07CC);
overlay_0x20000478 = overlay_FLASH_ReadByAHB(0x07B8);
Data = overlay_FLASH_ReadByAHB(0x07BC);
SYSCON_DEV_CLK_GATE = (SYSCON_DEV_CLK_GATE & ~SYSCON_DEV_CLK_GATE_SARADC_MASK) | SYSCON_DEV_CLK_GATE_SARADC_BITS_ENABLE;
SARADC_CALIB_OFFSET = ((Data & 0xFFFF) << SARADC_CALIB_OFFSET_OFFSET_SHIFT) & SARADC_CALIB_OFFSET_OFFSET_MASK;
SARADC_CALIB_KD = (((Data >> 16) & 0xFFFF) << SARADC_CALIB_KD_KD_SHIFT) & SARADC_CALIB_KD_KD_MASK;
overlay_FLASH_SetArea(FLASH_AREA_MAIN);
}