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refactor SPI handling and introduce SPI CS

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This commit is contained in:
Wolfgang Hottgenroth
2024-03-21 20:55:26 +01:00
parent 474fce2278
commit 9acd56b79b
7 changed files with 12 additions and 108 deletions
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7
rgb-driver/main.S
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@ -96,11 +96,12 @@ init:
;; BIT3: Signal waiting for data
mov.b #BIT0|BIT1|BIT2|BIT3, &P1DIR
mov.b #0,&P1OUT
;; BIT4: spi, UCB0STE
;; BIT5: spi, UCB0CLK
;; BIT6: spi, UCB0SOMI
;; BIT7: spi, UCB0SIMO
mov.b #BIT5|BIT6|BIT7, &P1SEL
mov.b #BIT5|BIT6|BIT7, &P1SEL2
mov.b #BIT4|BIT5|BIT6|BIT7, &P1SEL
mov.b #BIT4|BIT5|BIT6|BIT7, &P1SEL2
;; BIT4: long pulse
;; BIT1: short pulse
mov.b #BIT1|BIT4,&P2DIR
@ -122,7 +123,7 @@ init:
;; spi configuration
;; USCI B to slave mode
mov.b #UCSYNC, &UCB0CTL0
mov.b #UCSYNC|UCMODE_2, &UCB0CTL0
mov.b #0x00, &UCB0CTL1
;; make sure the isr will not immediately start