kopia lustrzana https://github.com/stlink-org/stlink
Merge pull request #316 from radii/stm32f4-low-voltage
STM32F4 8-bit support for 1.8v operationpull/320/head
commit
bf5c470e59
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@ -0,0 +1,33 @@
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.global start
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.syntax unified
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@ r0 = source
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@ r1 = target
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@ r2 = wordcount
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@ r3 = flash_base
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@ r4 = temp
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start:
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lsls r2, r2, #2
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ldr r3, flash_base
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next:
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cbz r2, done
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ldrb r4, [r0]
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strb r4, [r1]
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wait:
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ldrh r4, [r3, #0x0e]
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tst.w r4, #1
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bne wait
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add r0, #1
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add r1, #1
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sub r2, #1
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b next
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done:
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bkpt
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.align 2
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flash_base:
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.word 0x40023c00
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@ -65,6 +65,7 @@
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//STM32L0x flash register base and offsets
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//same as 32L1 above
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// RM0090 - DM00031020.pdf
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#define STM32L0_FLASH_REGS_ADDR ((uint32_t)0x40022000)
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#define FLASH_ACR_OFF ((uint32_t) 0x00)
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#define FLASH_PECR_OFF ((uint32_t) 0x04)
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@ -1374,6 +1375,29 @@ int write_loader_to_sram(stlink_t *sl, stm32_addr_t* addr, size_t* size) {
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0x00, 0x3c, 0x02, 0x40,
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};
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static const uint8_t loader_code_stm32f4_lv[] = {
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// flashloaders/stm32f4lv.s
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0x92, 0x00,
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0x08, 0x4b,
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0x62, 0xb1,
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0x04, 0x78,
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0x0c, 0x70,
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0xdc, 0x89,
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0x14, 0xf0, 0x01, 0x0f,
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0xfb, 0xd1,
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0x00, 0xf1, 0x01, 0x00,
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0x01, 0xf1, 0x01, 0x01,
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0xa2, 0xf1, 0x01, 0x02,
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0xf1, 0xe7,
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0x00, 0xbe,
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0x00, 0xbf,
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0x00, 0x3c, 0x02, 0x40,
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};
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const uint8_t* loader_code;
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size_t loader_size;
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@ -1391,8 +1415,14 @@ int write_loader_to_sram(stlink_t *sl, stm32_addr_t* addr, size_t* size) {
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loader_size = sizeof(loader_code_stm32vl);
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} else if (sl->chip_id == STM32_CHIPID_F2 || sl->chip_id == STM32_CHIPID_F4 || (sl->chip_id == STM32_CHIPID_F4_DE) ||
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sl->chip_id == STM32_CHIPID_F4_LP || sl->chip_id == STM32_CHIPID_F4_HD || (sl->chip_id == STM32_CHIPID_F411RE)){
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int voltage = stlink_target_voltage(sl);
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if (voltage > 2700) {
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loader_code = loader_code_stm32f4;
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loader_size = sizeof(loader_code_stm32f4);
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} else {
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loader_code = loader_code_stm32f4_lv;
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loader_size = sizeof(loader_code_stm32f4_lv);
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}
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} else if (sl->chip_id == STM32_CHIPID_F0 || sl->chip_id == STM32_CHIPID_F04 || sl->chip_id == STM32_CHIPID_F0_CAN || sl->chip_id == STM32_CHIPID_F0_SMALL || sl->chip_id == STM32_CHIPID_F09X) {
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loader_code = loader_code_stm32f0;
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loader_size = sizeof(loader_code_stm32f0);
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@ -1588,7 +1618,14 @@ int stlink_write_flash(stlink_t *sl, stm32_addr_t addr, uint8_t* base, uint32_t
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/* TODO: Check that Voltage range is 2.7 - 3.6 V */
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/* set parallelisim to 32 bit*/
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int voltage = stlink_target_voltage(sl);
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if (voltage > 2700) {
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printf("enabling 32-bit flash writes\n");
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write_flash_cr_psiz(sl, 2);
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} else {
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printf("Target voltage (%d mV) too low for 32-bit flash, using 8-bit flash writes\n", voltage);
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write_flash_cr_psiz(sl, 0);
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}
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/* set programming mode */
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set_flash_cr_pg(sl);
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