From 0d7aca0060da12804bb039bc2011e7d546337baf Mon Sep 17 00:00:00 2001
From: Martin Preuss <martin@aquamaniac.de>
Date: Sun, 19 Jan 2025 15:49:18 +0100
Subject: [PATCH] t03: use new bootloader code.

---
 avr/devices/t03/boot.asm | 170 +++++++++++++++++++++++++++++++++++----
 1 file changed, 155 insertions(+), 15 deletions(-)

diff --git a/avr/devices/t03/boot.asm b/avr/devices/t03/boot.asm
index a733c66..c5ddd5a 100644
--- a/avr/devices/t03/boot.asm
+++ b/avr/devices/t03/boot.asm
@@ -6,7 +6,8 @@
 ; All definitions and changes should go into this file.
 ; ***************************************************************************
 
-.equ clock=1000000 ; Define the clock frequency
+;.equ clock=1000000 ; Define the clock frequency
+.equ clock=8000000 ; Define the clock frequency
 
 .nolist
 .include "include/tn841def.inc" ; Define device ATtiny841
@@ -111,8 +112,38 @@ firmwareStart:   rjmp main ; will be overwritten when flashing
 
 
 main:
-;  rjmp debugStop
-  rjmp bootLoader ; this routine is in modules/flash/proto.asm
+  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
+
+#if 1
+  ; start by setting all ports as inputs and enable internal pull-up resistors
+  ldi r16, 0xff
+  clr r17
+.ifdef PORTA
+  out DDRA, r17  ; all input
+  out PORTA, r16 ; enable pull-up on all
+.endif
+
+.ifdef PORTB
+  out DDRB, r17  ; all input
+  out PORTB, r16 ; enable pull-up on all
+.endif
+
+.ifdef PORTC
+  out DDRC, r17  ; all input
+  out PORTC, r16 ; enable pull-up on all
+.endif
+#endif
+
+  rcall systemSetSpeed
+; rjmp debugUsart2
+  rjmp bootLoader ; this routine is in modules/flash/bootloader2.asm
 
 
 
@@ -120,26 +151,102 @@ main:
 ; ***************************************************************************
 ; includes
 
-.include "modules/uart_bitbang/bytelevel.asm"
-.include "modules/uart_bitbang/packetlevel.asm"
+;.include "modules/uart_bitbang/bytelevel.asm"
+;.include "modules/uart_bitbang/packetlevel.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/bootloader.asm"
+.include "modules/flash/defs.asm"
+.include "modules/flash/bootloader2.asm"
+.include "modules/flash/io.asm"
+.include "modules/flash/io_uart1.asm"
 .include "modules/flash/flash.asm"
-.include "modules/flash/recv.asm"
-.include "modules/flash/send.asm"
+.include "modules/flash/flashprocess.asm"
+;.include "modules/flash/recv.asm"
+;.include "modules/flash/send.asm"
 .include "modules/flash/wait.asm"
-.include "modules/flash/hdl_flash_start.asm"
-.include "modules/flash/hdl_flash_data.asm"
-.include "modules/flash/hdl_flash_end.asm"
-.include "modules/flash/flash_rsp.asm"
-.include "modules/flash/flash_ready.asm"
+;.include "modules/flash/hdl_flash_start.asm"
+;.include "modules/flash/hdl_flash_data.asm"
+;.include "modules/flash/hdl_flash_end.asm"
+;include "modules/flash/flash_rsp.asm"
+;include "modules/flash/flash_ready.asm"
 
 
-#if 1
+#if 0
+debugUsart1:
+  sbi LED_DDR, LED_PINNUM  ; out
+  cbi LED_PORT, LED_PINNUM ; on
+
+  ldi r16, 3  ; (19.2Kb/s at 1MHz)
+  ldi r17, 0  
+  sts UBRR1H, r17
+  sts UBRR1L, r16
+
+  ldi r16, (3<<UCSZ10)
+  sts UCSR1C, r16
+  
+  lds r16, UCSR1B
+  cbr r16, (1<<UDRIE1)  ; disable DRE interrupt
+  sbr r16, (1<<TXEN1)   ; enable transmit
+  sts UCSR1B, r16
+
+;  ldi r16, (1<<UDRE1)
+;  sts UCSR1A, r16
+
+  clr r18
+debugUsart1_loop:
+debugUsart1_loop2:
+      lds r16, UCSR1A
+      sbrs r16,UDRE1
+    rjmp debugUsart1_loop2
+;    sbr r16, (1<<TXC1)
+;    sts UCSR1A, r16
+    sts UDR1, r18
+    cpi r18, 10
+    brne debugUsart1_skipLed
+    clr r18
+    rcall debugWaitFor100MilliSecs
+    sbi LED_PIN, LED_PINNUM                  ; toggle
+debugUsart1_skipLed:
+    inc r18
+  rjmp debugUsart1_loop
+#endif
+
+
+
+debugUsart2:
+  sbi LED_DDR, LED_PINNUM  ; out
+  cbi LED_PORT, LED_PINNUM ; on
+
+  ldi r16, 2  ; (19.2Kb/s at 1MHz)
+;  ldi r16, 25  ; (19.2Kb/s at 8MHz)
+  ldi r17, 0  
+  sts UBRR1H, r17
+  sts UBRR1L, r16
+
+  ldi r16, (3<<UCSZ10)
+  sts UCSR1C, r16
+  
+  lds r16, UCSR1B
+  cbr r16, (1<<UDRIE1)  ; disable DRE interrupt
+  sbr r16, (1<<TXEN1)   ; enable transmit
+  sts UCSR1B, r16
+
+  ldi xl, LOW(flashSendBuffer)
+  ldi xh, HIGH(flashSendBuffer)
+  rcall flashProcessWriteFlashReady       ; (R16, R17, R18, R19, R20, Y, Z)
+
+debugUsart2_loop:
+  rcall flashRawSendMsg                   ; (r16, r17, X)
+  rcall debugWaitFor100MilliSecs
+  sbi LED_PIN, LED_PINNUM                 ; toggle
+  rjmp debugUsart2_loop
+
+
+#if 0
 debugStop:
   cli
   sbi LED_SIMPLE_DDR, LED_SIMPLE_PINNUM  ; out
@@ -174,5 +281,38 @@ test1:
   rjmp test_loop1
 #endif
 
-  
+
+
+debugWaitFor100MilliSecs:
+  ldi r16, 10
+debugWaitFor10MilliSecs_loop1:
+    ldi r17, 100
+debugWaitFor10MilliSecs_loop2:
+      rcall Utils_WaitFor100MicroSecs ; 10ms
+      dec r17
+    brne debugWaitFor10MilliSecs_loop2
+    dec r16
+  brne debugWaitFor10MilliSecs_loop1
+  ret
+
+
+
+systemSetSpeed:
+.if clock == 1000000
+  ldi r17, 0xd8
+  ldi r16, (1<<CLKPS1) | (1<<CLKPS0) ; SUT=0, CLKPS=0011b
+  sts CCP, r17
+  sts CLKPR, r16
+.endif
+
+.if clock == 8000000
+  ldi r17, 0xd8
+  clr r16           ; SUT=0, CLKPS=0
+  sts CCP, r17
+  sts CLKPR, r16
+.endif
+  ret
+
+
+