Erik - / Mbed 2 deprecated FOTA_K64F

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Dependencies:   mbed EthernetInterface mbed-rtos

Fork of Bootloader_K64F by Erik -

Bootloader/bootloader.h@7:4ab0430d06e3, 2016-04-23 (annotated)

Committer:
Sissors
Date:
Sat Apr 23 15:10:04 2016 +0000
Revision:
7:4ab0430d06e3
Child:
8:00cefe0d59ed
Serial bootloader functional.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
Sissors 7:4ab0430d06e3 1 #define START_ADDRESS 0x80000
Sissors 7:4ab0430d06e3 2 #define NUM_SECTORS 120
Sissors 7:4ab0430d06e3 3 #define SECTOR_SIZE 4096
Sissors 7:4ab0430d06e3 4 #define BUFFER_SIZE 16
Sissors 7:4ab0430d06e3 5 #define TIMEOUT 10000000
Sissors 7:4ab0430d06e3 6
Sissors 7:4ab0430d06e3 7 int *(*program_flash_boot)(int, char*, unsigned int) = (int *(*)(int, char*, unsigned int))0x795C9;
Sissors 7:4ab0430d06e3 8 int *(*erase_sector_boot)(int) = (int *(*)(int))0x79465;
Sissors 7:4ab0430d06e3 9 void *(*bootloader)(int) = (void *(*)(int))0x79121;
Sissors 7:4ab0430d06e3 10
Sissors 7:4ab0430d06e3 11 static void write(char *value)
Sissors 7:4ab0430d06e3 12 {
Sissors 7:4ab0430d06e3 13 int i = 0;
Sissors 7:4ab0430d06e3 14 //Loop through string and send everything
Sissors 7:4ab0430d06e3 15 while(*(value+i) != '\0') {
Sissors 7:4ab0430d06e3 16 while(!(UART0->S1 & UART_S1_TDRE_MASK));
Sissors 7:4ab0430d06e3 17 UART0->D = *(value+i);
Sissors 7:4ab0430d06e3 18 i++;
Sissors 7:4ab0430d06e3 19 }
Sissors 7:4ab0430d06e3 20 }
Sissors 7:4ab0430d06e3 21
Sissors 7:4ab0430d06e3 22
Sissors 7:4ab0430d06e3 23 void write_flash(void) {
Sissors 7:4ab0430d06e3 24 __disable_irq();
Sissors 7:4ab0430d06e3 25 printf("Erasing flash!\r\n");
Sissors 7:4ab0430d06e3 26 for (int i = 0; i < NUM_SECTORS; i++)
Sissors 7:4ab0430d06e3 27 erase_sector_boot(START_ADDRESS + i * SECTOR_SIZE);
Sissors 7:4ab0430d06e3 28
Sissors 7:4ab0430d06e3 29 char buffer[BUFFER_SIZE];
Sissors 7:4ab0430d06e3 30 uint32_t count = 0;
Sissors 7:4ab0430d06e3 31 uint8_t buffercount = 0;
Sissors 7:4ab0430d06e3 32 uint32_t timeout = 0;
Sissors 7:4ab0430d06e3 33
Sissors 7:4ab0430d06e3 34 //Wait until data is sent
Sissors 7:4ab0430d06e3 35 while(!(UART0->S1 & UART_S1_RDRF_MASK));
Sissors 7:4ab0430d06e3 36
Sissors 7:4ab0430d06e3 37 //Data receive loop
Sissors 7:4ab0430d06e3 38 while(1) {
Sissors 7:4ab0430d06e3 39 //Check if there is new data
Sissors 7:4ab0430d06e3 40 if (UART0->S1 & UART_S1_RDRF_MASK) {
Sissors 7:4ab0430d06e3 41 //Place data in buffer
Sissors 7:4ab0430d06e3 42 buffer[buffercount] = UART0->D;
Sissors 7:4ab0430d06e3 43 buffercount++;
Sissors 7:4ab0430d06e3 44
Sissors 7:4ab0430d06e3 45 //Reset timeout
Sissors 7:4ab0430d06e3 46 timeout = 0;
Sissors 7:4ab0430d06e3 47
Sissors 7:4ab0430d06e3 48 //We write per BUFFER_SIZE chars
Sissors 7:4ab0430d06e3 49 if (buffercount == BUFFER_SIZE) {
Sissors 7:4ab0430d06e3 50 //NMI Handler is at bytes 8-9-10-11, we overwrite this to point to bootloader function
Sissors 7:4ab0430d06e3 51
Sissors 7:4ab0430d06e3 52 //Program the buffer into the flash memory
Sissors 7:4ab0430d06e3 53 if (program_flash_boot(count+START_ADDRESS, buffer, BUFFER_SIZE) != 0) {
Sissors 7:4ab0430d06e3 54 write("Error!\r\n");
Sissors 7:4ab0430d06e3 55 break;
Sissors 7:4ab0430d06e3 56 }
Sissors 7:4ab0430d06e3 57
Sissors 7:4ab0430d06e3 58 //Reset buffercount for next buffer
Sissors 7:4ab0430d06e3 59 write("#");
Sissors 7:4ab0430d06e3 60 buffercount = 0;
Sissors 7:4ab0430d06e3 61 count += BUFFER_SIZE;
Sissors 7:4ab0430d06e3 62 }
Sissors 7:4ab0430d06e3 63 } else {
Sissors 7:4ab0430d06e3 64 //No new data, increase timeout
Sissors 7:4ab0430d06e3 65 timeout++;
Sissors 7:4ab0430d06e3 66
Sissors 7:4ab0430d06e3 67 //We have received no new data for a while, assume we are done
Sissors 7:4ab0430d06e3 68 if (timeout > TIMEOUT) {
Sissors 7:4ab0430d06e3 69 //If there is data left in the buffer, program it
Sissors 7:4ab0430d06e3 70 if (buffercount != 0) {
Sissors 7:4ab0430d06e3 71 for (int i = buffercount; i<BUFFER_SIZE; i++) {
Sissors 7:4ab0430d06e3 72 buffer[i] = 0xFF;
Sissors 7:4ab0430d06e3 73 }
Sissors 7:4ab0430d06e3 74 program_flash_boot(count+START_ADDRESS, buffer, BUFFER_SIZE);
Sissors 7:4ab0430d06e3 75 count += BUFFER_SIZE;
Sissors 7:4ab0430d06e3 76 }
Sissors 7:4ab0430d06e3 77 break; //We should be done programming :D
Sissors 7:4ab0430d06e3 78 }
Sissors 7:4ab0430d06e3 79 }
Sissors 7:4ab0430d06e3 80 }
Sissors 7:4ab0430d06e3 81
Sissors 7:4ab0430d06e3 82 printf("Done writing\r\n");
Sissors 7:4ab0430d06e3 83 printf("Size = %d - %X\r\n", count, count);
Sissors 7:4ab0430d06e3 84
Sissors 7:4ab0430d06e3 85 bootloader(count);
Sissors 7:4ab0430d06e3 86
Sissors 7:4ab0430d06e3 87 }