\n \n<\/p>\n
\r\n\r\n\t#asm\r\n\tGLOBAL _uc_asm_irq_temp\r\n\tGLOBAL _uc_asm_irq_temp1\r\n\t\/\/Reset timer for next rollover\r\n\tmovff\tTMR0L,_uc_asm_irq_temp\t\t\t\/\/read_current_timer_value (read low byte loads high byte)\r\n\tmovff\tTMR0H,_uc_asm_irq_temp1\r\n\tmovlw\t0xfb\r\n\taddwf\t_uc_asm_irq_temp,1,0\t\t\t\t\/\/(1 = file register, 0 = access ram)\r\n\tmovlw\t0xd8\r\n\taddwfc\t_uc_asm_irq_temp1,1,0\t\t\t\/\/(1 = file register, 0 = access ram)\r\n\tmovff\t_uc_asm_irq_temp1,TMR0H\t\t\t\/\/Store new value (high byte first)\r\n\tmovff\t_uc_asm_irq_temp,TMR0L\r\n\t#endasm\r\n<\/code><\/pre>\n\nNewer versions of XC8 generate a "error: (876) syntax error" to the use of the above. It turns out ",1,0" on the end of the addwf and addwfc lines are the issue (even though these numeric values are specified for use in device datasheets). \n<\/p>\n
\nThe '1' needs to change to 'f' for file register.\n<\/p>\n
\nThe '0' needs to change to 'c' for common memory \/ access ram (the alternative would be 'b' for bank select register.\n<\/p>\n
\nSee XC8 user guide in section 6.2.1 \n<\/p>\n
\r\n\r\n#asm\r\n\tGLOBAL _uc_asm_irq_temp\r\n\tGLOBAL _uc_asm_irq_temp1\r\n\t\/\/Reset timer for next rollover\r\n\tmovff\tTMR0L,_uc_asm_irq_temp\t\t\t\/\/read_current_timer_value (read low byte loads high byte)\r\n\tmovff\tTMR0H,_uc_asm_irq_temp1\r\n\tmovlw\t0xfb\r\n\taddwf\t_uc_asm_irq_temp,f,c\t\t\t\t\/\/(1 = file register, 0 = access ram)\r\n\tmovlw\t0xd8\r\n\taddwfc\t_uc_asm_irq_temp1,f,c\t\t\t\/\/(1 = file register, 0 = access ram)\r\n\tmovff\t_uc_asm_irq_temp1,TMR0H\t\t\t\/\/Store new value (high byte first)\r\n\tmovff\t_uc_asm_irq_temp,TMR0L\r\n\t#endasm\r\n<\/code><\/pre>\n\n <\/p>\n","protected":false},"excerpt":{"rendered":"
#asm GLOBAL _uc_asm_irq_temp GLOBAL _uc_asm_irq_temp1 \/\/Reset timer for next rollover movff TMR0L,_uc_asm_irq_temp \/\/read_current_timer_value (read low byte loads high byte) movff TMR0H,_uc_asm_irq_temp1 movlw 0xfb addwf _uc_asm_irq_temp,1,0 \/\/(1 = file register, 0 = access ram) movlw 0xd8 addwfc _uc_asm_irq_temp1,1,0 \/\/(1 = file register, 0 = access ram) movff _uc_asm_irq_temp1,TMR0H \/\/Store new value (high byte first) movff […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[24],"tags":[],"class_list":["post-596","post","type-post","status-publish","format-standard","hentry","category-issues"],"_links":{"self":[{"href":"https:\/\/ibex.tech\/embedded\/wp-json\/wp\/v2\/posts\/596","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ibex.tech\/embedded\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ibex.tech\/embedded\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ibex.tech\/embedded\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/ibex.tech\/embedded\/wp-json\/wp\/v2\/comments?post=596"}],"version-history":[{"count":2,"href":"https:\/\/ibex.tech\/embedded\/wp-json\/wp\/v2\/posts\/596\/revisions"}],"predecessor-version":[{"id":598,"href":"https:\/\/ibex.tech\/embedded\/wp-json\/wp\/v2\/posts\/596\/revisions\/598"}],"wp:attachment":[{"href":"https:\/\/ibex.tech\/embedded\/wp-json\/wp\/v2\/media?parent=596"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ibex.tech\/embedded\/wp-json\/wp\/v2\/categories?post=596"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ibex.tech\/embedded\/wp-json\/wp\/v2\/tags?post=596"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}