Diff: FreescaleIAP/bootloader.cpp

Revision:

10:fb5121bcc468

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/FreescaleIAP/bootloader.cpp	Sun Apr 24 12:46:37 2016 +0000
@@ -0,0 +1,80 @@
+#include "mbed.h"
+#include "FreescaleIAP.h"
+
+//Could be nicer, but for now just erase all preceding sectors
+#define NUM_SECTORS        120
+#define TIMEOUT            10000000
+#define BUFFER_SIZE        16
+
+void setupserial();
+void write(char *value);
+
+__attribute__((section(".ARM.__at_0x79120"))) void bootloader(int size)
+{
+    SysTick->CTRL = 0;
+    __disable_irq();
+
+    setupserial();
+    write("\n\n\rBootloader\r\n");
+    
+    //Erase all sectors we use for the user program
+    write("Erasing sectors!\r\n");
+        
+    for (int i = 0; i<NUM_SECTORS; i++) {
+        write("*");
+        erase_sector(SECTOR_SIZE * i);
+    }
+
+    write("Done erasing, reading file!\r\n");
+
+    
+    char buffer[BUFFER_SIZE];
+    char *source = (char*)0x80000;
+    
+    //Data receive loop
+    for(int count = 0; count<size; count+=BUFFER_SIZE) {
+        for (int i = 0; i<BUFFER_SIZE; i++)
+            buffer[i] = source[i+count];
+        
+        if (program_flash(count, buffer, BUFFER_SIZE) != 0) {
+             write("Error!\r\n");   
+             break;
+        }
+                
+        //Reset buffercount for next buffer
+        write("%");
+    }             
+   
+    write("Done programming!\r\n");
+    NVIC_SystemReset();
+    
+    //Shouldn't arrive here
+    while(1);
+}
+
+__attribute__((section(".ARM.__at_0x79120"))) static void setupserial(void) {
+        //Setup USBTX/USBRX pins (PTB16/PTB17)
+        SIM->SCGC5 |= 1 << SIM_SCGC5_PORTB_SHIFT;
+        PORTB->PCR[16] = (PORTB->PCR[16] & 0x700) | (3 << 8);
+        PORTB->PCR[17] = (PORTB->PCR[17] & 0x700) | (3 << 8);
+
+        //Setup UART (ugly, copied resulting values from mbed serial setup)
+        SIM->SCGC4 |= SIM_SCGC4_UART0_MASK;
+
+        UART0->BDH = 3;
+        UART0->BDL = 13;
+        UART0->C4 = 8;
+        UART0->C2 = 12;  //Enables UART
+
+    }
+
+__attribute__((section(".ARM.__at_0x79120"))) static void write(char *value)
+{
+        int i = 0;
+        //Loop through string and send everything
+        while(*(value+i) != '\0') {
+            while(!(UART0->S1 & UART_S1_TDRE_MASK));
+            UART0->D = *(value+i);
+            i++;
+        }
+    }