avr: t03 runs in basic mode now, flashing of AtTiny841 finally works!!

This commit is contained in:
Martin Preuss
2025-01-25 03:16:02 +01:00
parent 779b37f195
commit e840bfd9e6
11 changed files with 916 additions and 342 deletions

View File

@@ -115,7 +115,6 @@ firmwareStart: rjmp main ; will be overwritten when flashing
main:
; rjmp debugEchoUart1
rjmp bootLoader ; this routine is in modules/bootloader/main.asm
@@ -124,16 +123,16 @@ main:
; ***************************************************************************
; includes
.include "modules/uart_hw/raw_uart1.asm"
;.include "modules/uart_hw/raw_uart1.asm"
.include "modules/com2/crc.asm"
.include "common/crc8.asm"
.include "common/utils_wait_fixed.asm"
.include "common/utils_copy_from_flash.asm"
.include "common/utils_copy_sdram.asm"
.include "modules/flash/defs.asm"
.include "modules/flash/eeprom.asm"
.include "modules/flash/io.asm"
.include "modules/flash/io_uart1.asm"
.include "modules/flash/flash.asm"
.include "modules/flash/flash4p.asm"
.include "modules/flash/flashprocess.asm"
.include "modules/flash/wait.asm"
.include "modules/bootloader/main.asm"
@@ -158,184 +157,3 @@ systemSetSpeed:
; debug
debugEchoUart1:
cli
; setup stack
.ifdef SPH ; if SPH is defined
ldi r16, High(RAMEND)
out SPH, r16 ; init MSB stack pointer
.endif
ldi r16, Low(RAMEND)
out SPL, r16 ; init LSB stack pointer
rcall systemSetSpeed
sbi LED_DDR, LED_PINNUM ; out
cbi LED_PORT, LED_PINNUM ; on
; set baudrate
.if clock == 8000000
ldi r16, 25 ; (19.2Kb/s at 8MHz)
ldi r17, 0
.endif
.if clock == 1000000
ldi r16, 3 ; (19.2Kb/s at 1MHz)
ldi r17, 0
.endif
sts UBRR1H, r17
sts UBRR1L, r16
; set character format (asynchronous USART, 8-bit, one stop bit, no parity)
ldi r16, (3<<UCSZ10)
sts UCSR1C, r16
; enable transceiver
lds r16, UCSR1B
; cbr r16, (1<<UDRIE1) ; disable DRE interrupt
ori r16, (1<<RXEN1) | (1<<TXEN1) ; enable transmit and receive
sts UCSR1B, r16
ldi zl, LOW(debugString*2)
ldi zh, HIGH(debugString*2)
rcall debugWriteString
debugEchoUart1_loop:
rcall debugReadByte
sbi LED_PIN, LED_PINNUM ; toggle
rcall debugWriteByte
rjmp debugEchoUart1_loop
debugReadByte:
lds r17, UCSR1A
sbrs r17, RXC1
rjmp debugReadByte
lds r16, UDR1
ret
debugWriteByte:
lds r17, UCSR1A
sbrs r17, UDRE1
rjmp debugWriteByte
; sbr r17, (1<<TXC1)
; sts UCSR1A, r17
sts UDR1, r16
ret
debugWriteString:
lpm r16, Z+
tst r16
breq debugWriteString_done
rcall debugWriteByte
rjmp debugWriteString
debugWriteString_done:
ret
debugString: .db "Hello", 13, 10, 0
debugPrintLoop:
sbi LED_PORT, LED_PINNUM ; off
; enable transceiver
lds r17, UCSR1B
; cbr r17, (1<<UDRIE1) ; disable DRE interrupt
ori r17, (1<<RXEN1) | (1<<TXEN1) ; enable transmit and receive
sts UCSR1B, r17
debugPrintLoop1:
push r16
rcall debugPrintHexByte
ldi r16, 13
rcall debugPrintOneChar ; (r17)
ldi r16, 10
rcall debugPrintOneChar ; (r17)
ldi r16, 10
rcall flashWaitForMulti100ms
pop r16
rjmp debugPrintLoop1
; ---------------------------------------------------------------------------
; @routine debugPrintHexByte
;
; Convert a give byte into HEX and write it to USART1.
;
; @return CFLAG set if okay, cleared on error
; @param R16 byte to convert to print
; @clobbers r16, r20 (r17)
debugPrintHexByte:
mov r20, r16
swap r16
rcall debugNibbleToAscii ; write high nibble (r17)
rcall debugPrintOneChar ; (r17)
brcc debugPrintHexByte_error
mov r16, r20
rcall debugNibbleToAscii ; write low nibble (r17)
rcall debugPrintOneChar ; (r17)
brcc debugPrintHexByte_error
sec
ret
debugPrintHexByte_error:
clc
ret
; @end
; ---------------------------------------------------------------------------
; @routine debugNibbleToAscii
;
; Convert a nibble to an ASCII char.
; @return R16 ASCII representation of that nibble (e.g. '0' for 0)
; @param R16 byte (in bits 0-3)
; @clobbers r17
debugNibbleToAscii:
andi r16, 0xf
cpi r16, 10
brcs debugNibbleToAscii_l1
ldi r17, 7
add r16, r17
debugNibbleToAscii_l1:
ldi r17, '0'
add r16, r17
ret
; @end
; ---------------------------------------------------------------------------
; @routine debugPrintOneChar
;
; Write one byte to UART1.
; @param R16 byte to send
; @clobbers r17
debugPrintOneChar:
lds r17, UCSR1A
sbrs r17, UDRE1
rjmp debugPrintOneChar
sbr r17, (1<<TXC1)
sts UCSR1A, r17
sts UDR1, r16
sec
ret
; @end