diff options
Diffstat (limited to 'bootloader/bootloader-887.asm')
| -rw-r--r-- | bootloader/bootloader-887.asm | 278 |
1 files changed, 6 insertions, 272 deletions
diff --git a/bootloader/bootloader-887.asm b/bootloader/bootloader-887.asm index 03307df..dbe2fac 100644 --- a/bootloader/bootloader-887.asm +++ b/bootloader/bootloader-887.asm @@ -74,285 +74,19 @@ cnt EQU H'007F' ;; ------------------------------------- ;; DEFINES (defines) - ;; ERROR codes -E_OK EQU .0 -E_INV_CMD EQU .1 -E_BAD_CSUM EQU .2 -E_NOT_IMPL EQU .3 -E_FLASH_WERR EQU .4 -E_ADDR_INVALID EQU .5 -E_ADDR_PROHIB EQU .6 -E_VALUE_OOB EQU .7 - - ;; CMD codes -CMD_INVALID EQU .0 - -CMD_IDENTIFY EQU .1 -CMD_BOOT EQU .2 -CMD_RESET EQU .3 -CMD_R_FLASH EQU .4 -CMD_W_FLASH EQU .5 -CMD_R_EEPROM EQU .6 -CMD_W_EEPROM EQU .7 -CMD_R_CONFIG EQU .8 -CMD_W_CONFIG EQU .9 - -CMD_MAX EQU .9 -CMD_MIN_LEN EQU .3 - - ;; ------------------------------------- - ;; Boot test - org .0 - ;; btfsc BOOTPIN - ;; goto USERVECT - goto com_init +#include "generic-defines.inc" ;; ------------------------------------- - ;; goto user ISR - org .4 -isr - goto ISRVECT - - ;; ------------------------------------- - ;; Bootloader (Generic Subroutines) -send_answer ; generic answer message, leave len of data in W - addlw .3 - movwf combuff + .1 - decf combuff + .1,w - movwf cnt - movlw combuff - movwf FSR - clrf csum -send_answer_next - movf INDF,w - call com_tx_byte - incf FSR,f - decfsz cnt,f - goto send_answer_next - - movf csum,w - call com_tx_byte - return - - ;; ------------------ -ack_cmd ; short answers which only contain return code - movwf combuff + .2 - movlw .1 - call send_answer - return - + ;; Bootloader init +#include "generic-init.inc" ;; ------------------------------------- ;; Bootloader (com specific subroutines and init) - ;; ------------------ -com_tx_byte ;send one byte and add it to csum - btfss PIR1,TXIF - goto com_tx_byte - movwf TXREG - xorwf csum,f - return - - ;; ------------------ -com_rx_byte - btfsc RCSTA,OERR - goto uart_rx_oe - btfss PIR1,RCIF - goto com_rx_byte - btfsc RCSTA,FERR - goto uart_rx_fe - movf RCREG,w - return - -uart_rx_oe ; recover from overflow - bcf RCSTA,CREN - bsf RCSTA,CREN - goto com_rx_byte - -uart_rx_fe ; recover from framing error - movf RCREG,w - goto com_rx_byte - - ;; ------------------ -com_init - ;; bank 3 - bsf STATUS,RP0 - bsf STATUS,RP1 - movlw b'00001000' ; TX non-inverted, 16bit Baudrate, no auto baud detect - ;; movlw b'00011000' ; TX inverted, 16bit Baudrate, no auto baud detect - movwf BAUDCTL - - ;; bank 1 - bcf STATUS,RP1 - movlw b'01110000' ; set internal OSC to 8MHz - movwf OSCCON - movlw b'00100100' ; Baudrate = High Speed, async mode, transmit enabled, 8bit - movwf TXSTA - movlw .34 ; Baudrate = 57600 (@ 8MHz) -> -0,79 % Error - ;; movlw .51 ; Baudrate = 38400 (@ 8MHz) -> -0,002 % Error - ;; movlw .103 ; Baudrate = 19200 (@ 8MHz) -> 0,16 % Error - movwf SPBRG - clrf SPBRGH - - ;; bank 0 - bcf STATUS,RP0 - movlw b'10010000' ; enable Serial Port, 8bit, enable continues receive, disable address detection - movwf RCSTA +#include "com-887-uart.inc" ;; ------------------------------------- - ;; Bootloader (generic init) - -wait_new_cmd - movlw combuff - movwf FSR - clrf combuff - clrf current_cmdlen - clrf flags - -wait_cmd - call com_rx_byte - movwf INDF ; process received byte - incf FSR,f - btfss F_CMD_STARTED - goto wait_cmd_len - movf current_cmdlen,f - btfsc STATUS,Z - goto new_cmd - decfsz current_cmdlen,f - goto wait_cmd - goto exec_cmd - -wait_cmd_len ; command code received, now wait for length - bsf F_CMD_STARTED - goto wait_cmd - -new_cmd ; got new command code and length -> check it - movf combuff,w - sublw CMD_MAX - btfss STATUS,C - goto invalid_cmd - movlw CMD_MIN_LEN ; check for minimum command len - subwf combuff + .1,w - btfss STATUS,C - goto invalid_cmd - movlw .2 ; 2 bytes already received - subwf combuff + .1,w - movwf current_cmdlen - goto wait_cmd - -exec_cmd ; command is complete -> check csum - movlw combuff - movwf FSR - movf combuff + .1,w - movwf cnt - clrf csum -exec_cmd_check_csum - movf INDF,w - xorwf csum,f - incf FSR,f - decfsz cnt,f - goto exec_cmd_check_csum - movf csum,f - btfss STATUS,Z - goto csum_error - - movf combuff,w ; command is correct and complete -> dispatch - addwf PCL,f - goto wait_new_cmd - goto cmd_identify ; identify - goto cmd_boot ; boot - goto HOOK_CMD_RESET ; reset - goto HOOK_CMD_R_FLASH ; read flash segment - goto HOOK_CMD_W_FLASH ; write flash segment - goto HOOK_CMD_R_EEPROM ; read eeprom - goto HOOK_CMD_W_EEPROM ; write eeprom - goto HOOK_CMD_R_CONFIG ; read config - goto HOOK_CMD_R_CONFIG ; write config - - ;; ** generic error messages ******* -invalid_cmd ; received command code is not known or len is bogus - movlw E_INV_CMD - call ack_cmd - goto wait_new_cmd - -csum_error ; received command has an invalid check sum - movlw E_BAD_CSUM - call ack_cmd - goto wait_new_cmd - -address_invalid ; received command uses invalid address (i.e. not aligned to 16bytes) - movlw E_ADDR_INVALID - call ack_cmd - goto wait_new_cmd - -address_prohibited ; received command uses prohibited address (i.e. FLASH < 0x100) - movlw E_ADDR_PROHIB - call ack_cmd - goto wait_new_cmd - - ;; ** generic command handlers ************ - ;; ** identify ******* -cmd_identify - clrf csum - movf combuff,w - call com_tx_byte - - movlw .19 - call com_tx_byte - - movlw E_OK - call com_tx_byte - - movlw VERSION_MIN - call com_tx_byte - movlw VERSION_MAJ - call com_tx_byte - - movlw NAME_0 - call com_tx_byte - movlw NAME_1 - call com_tx_byte - movlw NAME_2 - call com_tx_byte - - movlw DEVID_L - call com_tx_byte - movlw DEVID_H - call com_tx_byte - - movlw FLASH_SIZE_L - call com_tx_byte - movlw FLASH_SIZE_H - call com_tx_byte - movlw FSS - call com_tx_byte - - movlw EEPROM_SIZE_L - call com_tx_byte - movlw EEPROM_SIZE_H - call com_tx_byte - movlw MESS - call com_tx_byte - - movlw SUPPORTED_L - call com_tx_byte - movlw SUPPORTED_H - call com_tx_byte - - movf csum,w - call com_tx_byte - goto wait_new_cmd - - ;; ** boot ******* -cmd_boot - movlw E_OK - call ack_cmd - goto USERVECT - - ;; ** not implemented commands ******* -cmd_not_impl - movlw E_NOT_IMPL - call ack_cmd - goto wait_new_cmd + ;; Bootloader (generic init/body) +#include "generic-mainloop.inc" ;; ------------------------------------- ;; chip specific commands |