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| author | Uri Shaked | 2020-02-03 21:23:55 +0200 |
|---|---|---|
| committer | Uri Shaked | 2020-02-03 21:23:55 +0200 |
| commit | 8c244a233966cce22b8e265cacebdc685b05c066 (patch) | |
| tree | cb616443b87ad52d960ecb68ca8af1dbfa077ea4 | |
| parent | test(twi): assembly code to test master transmit #10 (diff) | |
| download | avr8js-8c244a233966cce22b8e265cacebdc685b05c066.tar.gz avr8js-8c244a233966cce22b8e265cacebdc685b05c066.tar.bz2 avr8js-8c244a233966cce22b8e265cacebdc685b05c066.zip | |
test(twi): refactor assembly code to be shorter
Diffstat (limited to '')
| -rw-r--r-- | src/twi.spec.ts | 27 |
1 files changed, 11 insertions, 16 deletions
diff --git a/src/twi.spec.ts b/src/twi.spec.ts index 871bc41..4f57dc7 100644 --- a/src/twi.spec.ts +++ b/src/twi.spec.ts @@ -83,10 +83,7 @@ describe('TWI', () => { sts TWCR, r16 ; Wait for TWINT Flag set. This indicates that the START condition has been transmitted - wait1: - lds r16, TWCR - andi r16, TWINT - breq wait1 + call wait_for_twint ; Check value of TWI Status Register. Mask prescaler bits. If status different from START go to ERROR lds r16, TWSR @@ -104,10 +101,7 @@ describe('TWI', () => { sts TWCR, r16 ; Wait for TWINT Flag set. This indicates that the SLA+W has been transmitted, and ACK/NACK has been received. - wait2: - lds r16, TWCR - andi r16, TWINT - breq wait2 + call wait_for_twint ; Check value of TWI Status Register. Mask prescaler bits. If status different from MT_SLA_ACK go to ERROR lds r16, TWSR @@ -124,10 +118,7 @@ describe('TWI', () => { sts TWCR, r16 ; Wait for TWINT Flag set. This indicates that the DATA has been transmitted, and ACK/NACK has been received - wait3: - lds r16, TWCR - andi r16, TWINT - breq wait3 + call wait_for_twint ; Check value of TWI Status Register. Mask prescaler bits. If status different from MT_DATA_ACK go to ERROR lds r16, TWSR @@ -142,10 +133,7 @@ describe('TWI', () => { sts TWCR, r16 ; Wait for TWINT Flag set. This indicates that the STOP condition has been sent - wait4: - lds r16, TWCR - andi r16, TWINT - breq wait4 + call wait_for_twint ; Check value of TWI Status Register. The masked value should be 0xf8 once done lds r16, TWSR @@ -159,6 +147,13 @@ describe('TWI', () => { loop: jmp loop + ; Busy-waits for the TWINT flag to be set + wait_for_twint: + lds r16, TWCR + andi r16, TWINT + breq wait_for_twint + ret + ; In case of an error, toggle a breakpoint error: break |