library additions

lib/hw/pd8544.fs

@@ -0,0 +1,63 @@
+\ STM8S103 PD8544 "Nokia 3110 LCD"
+\ refer to github.com/TG9541/stm8ef/blob/master/LICENSE.md
+
+#require hw/spi.fs
+#include pd8544ctrl.fs
+
+NVM
+\ send c through SPI, discard input
+: LCDout ( c -- )
+  0 LCDdis
+  SPI 
+  1 LCDdis
+  drop
+;
+
+\ set horizontal cursor to c ( 0..83 )
+: LCDx ( c -- )
+  0 LCDdat
+  $80 + LCDout
+  1 LCDdat
+;
+
+\ set vertical cursor to c ( 0..5 )
+: LCDy ( c -- )
+  0 LCDdat
+  $40 + LCDout
+  1 LCDdat
+;
+
+\ set cursor to (0,0)
+: LCDhome ( -- )
+  0 LCDx 0 LCDy
+;
+
+\ fill LCD with pattern c (use y auto increment)
+: LCDfill ( c -- )
+  LCDhome 
+  503 for 
+    dup LCDout 
+  next drop 
+;
+
+\ init ports, SPI, PD8544 with Vop c (0..127) 
+: LCDinit ( c -- )
+  PD8544ctrl
+  SPIon
+  0 LCDdat
+  $21 LCDout \ instructions extended
+  $14 LCDout \ bias 4
+  $80 + LCDout \ Vop, e.g. 60
+  $20 LCDout \ instructions normal
+  $0C LCDout \ display conf ($08:blank,$09:on,$0C:normal,$0D:inv)
+  1 LCDdat
+  0 LCDfill
+;
+
+\ copy n chars starting at a to PD8544
+: LCDcpy ( a n -- )
+  for dup C@ LCDout 1+ next drop 
+;
+
+RAM
+

lib/hw/spi.fs

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+\ STM8S103 SPI
+\ derived from al177/stm8ef/HC12/boardcore.inc
+\ refer to github.com/TG9541/stm8ef/blob/master/LICENSE.md
+
+\ Example:
+\   SPIon
+\   $AA SPI .
+\   SPIoff
+
+#require RAMmark
+RAMmark
+#include regs_spi.fs
+
+NVM
+
+\ Init and enable SPI 
+: SPIon ( -- )
+  $14 SPI_CR1 C!  \ master, CLK/8, CPOL=CPHA=0, MSB first
+  $01 SPI_CR2 C!  \ no NSS, FD, no CRC
+  $54 SPI_CR1 C!  \ enable SPI 
+;
+
+\ disable SPI 
+: SPIoff ( -- )
+  0 SPI_CR1 C!    \ disable SPI
+;
+
+\ Perform SPI byte cycle with result c
+: SPI ( c -- c)
+  [ $E601 , $C752 ,          \ LD A,(1,X)  LD SPI_DR,A
+    $0472 , $0352 , $03FB ,  \ BTJF SPI_SR,#1,SPITXE_WAIT
+    $7201 , $5203 , $FBC6 ,  \ BTJF SPI_SR,#0,SPIRXNE_WAIT
+    $5204 , $E701 , ]        \ LD A,SPI_DR  LD (1,X),A
+;
+
+RAMdrop