looks like the bootload needs a character delay to work reliably ---
harcoded 1ms delay.
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@ -64,6 +64,7 @@ if (defined $filename) {
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print unpack('H',$c) . unpack('h',$c) if $verbose;
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print unpack('H',$c) . unpack('h',$c) if $verbose;
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print "\n" if ($verbose && ($i%4==0));
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print "\n" if ($verbose && ($i%4==0));
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$i++;
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$i++;
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select undef, undef, undef, 0.001;
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$ob->write($c);
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$ob->write($c);
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}
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}
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}
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}
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@ -12,26 +12,31 @@
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#include "embedded_types.h"
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#include "embedded_types.h"
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#define DELAY 1000
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#define DELAY 100000
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void main(void) {
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void main(void) {
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volatile uint32_t i;
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*(volatile uint32_t *)GPIO_FUNC_SEL0 = (0x01 << (14*2)); /* set GPIO14 to UART (UART1 TX)*/
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/* Restore UART regs. to default */
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// *(volatile uint32_t *)GPIO_FUNC_SEL0 = ( (0x01 << (14*2)) || (0x01 << (15*2)) ); /* set GPIO15-14 to UART (UART1 TX and RX)*/
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/* in case there is still bootloader state leftover */
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*(volatile uint32_t *)UART1_CON = 0x0000c800; /* mask interrupts, 16 bit sample --- helps explain the baud rate */
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/* INC = 76; MOD = 1000 */
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/* INC = 76; MOD = 1000 */
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*(volatile uint32_t *)UART1_BR = 0x004C03E8; /* Baud rate: (INC<<16 || MOD) */ /* is 115200 @ 24 MHz --- unexplained */
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*(volatile uint32_t *)UART1_BR = 0x004C03E8; /* Baud rate: (INC<<16 || MOD) */ /* is 115200 @ 24 MHz --- unexplained */
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/* see Section 11.5.1.2 Alternate Modes */
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/* you must enable the peripheral first BEFORE setting the function in GPIO_FUNC_SEL */
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/* From the datasheet: "The peripheral function will control operation of the pad IF */
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/* THE PERIPHERAL IS ENABLED. */
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*(volatile uint32_t *)UART1_CON = 0x00000003; /* enable receive and transmit */
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*(volatile uint32_t *)UART1_CON = 0x00000003; /* enable receive and transmit */
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*(volatile uint32_t *)GPIO_FUNC_SEL0 = ( (0x01 << (14*2)) | (0x01 << (15*2)) ); /* set GPIO15-14 to UART (UART1 TX and RX)*/
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uint32_t i;
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while(1) {
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while(1) {
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for(i=0; i<DELAY; i++) { continue; }
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for(i=0; i<DELAY; i++) { continue; }
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*(volatile uint32_t *)UART1_DATA = 'H';
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*(volatile uint32_t *)UART1_DATA = 'H';
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/* for(i=0; i<DELAY; i++) { continue; }
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for(i=0; i<DELAY; i++) { continue; }
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*(volatile uint32_t *)UART1_DATA = 'e';
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*(volatile uint32_t *)UART1_DATA = 'e';
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for(i=0; i<DELAY; i++) { continue; }
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for(i=0; i<DELAY; i++) { continue; }
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*(volatile uint32_t *)UART1_DATA = 'l';
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*(volatile uint32_t *)UART1_DATA = 'l';
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@ -40,14 +45,9 @@ void main(void) {
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for(i=0; i<DELAY; i++) { continue; }
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for(i=0; i<DELAY; i++) { continue; }
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*(volatile uint32_t *)UART1_DATA = 'o';
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*(volatile uint32_t *)UART1_DATA = 'o';
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for(i=0; i<DELAY; i++) { continue; }
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for(i=0; i<DELAY; i++) { continue; }
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*(volatile uint32_t *)UART1_DATA = ' ';
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*(volatile uint32_t *)UART1_DATA = 'W';
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*(volatile uint32_t *)UART1_DATA = 'o';
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*(volatile uint32_t *)UART1_DATA = 'r';
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*(volatile uint32_t *)UART1_DATA = 'l';
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*(volatile uint32_t *)UART1_DATA = 'd';
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*(volatile uint32_t *)UART1_DATA = '\n';
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*(volatile uint32_t *)UART1_DATA = '\n';
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*(volatile uint32_t *)UART1_DATA = '\r';*/
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for(i=0; i<DELAY; i++) { continue; }
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*(volatile uint32_t *)UART1_DATA = '\r';
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}
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}
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/* while(1) { */
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/* while(1) { */
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