Simple LM35 temperature sensor for adafruit neopixel
Fork of PololuLedStrip by
led_strip_write_color.s
- Committer:
- DavidEGrayson
- Date:
- 2013-02-27
- Revision:
- 0:06475317f283
- Child:
- 4:d3b60bd43811
File content as of revision 0:06475317f283:
AREA asm_func, CODE, READONLY EXPORT led_strip_write_color led_strip_write_color push {r12, r7} ldr r12, [r0] ; Read the next color. rbit r12, r12 ; Reverse the order of the bits. rev r12, r12 ; Reverse the order of the bytes. mov r7, #24 ; Initialize the loop counter register. send_led_strip_bit str r3, [r1] ; Drive the line high. rrxs r12, r12 ; Rotate right through carry. nop nop nop nop nop nop nop nop nop nop nop nop nop nop nop nop nop nop nop nop nop nop nop nop nop nop nop nop nop nop nop nop nop nop nop nop nop nop nop nop nop nop nop nop nop nop nop nop nop nop nop nop nop nop nop nop nop nop nop nop nop nop nop nop it cc ; If the bit to send it 0... strcc r3, [r2] ; Drive the line low. nop nop nop nop nop nop nop nop nop nop nop nop nop nop nop nop nop nop nop nop nop nop nop nop nop nop nop nop nop nop nop nop nop nop nop nop nop nop nop nop nop nop nop nop nop nop nop nop nop nop nop nop nop nop nop nop nop nop nop it cs ; If the bit to send is 1... strcs r3, [r2] ; Drive the line low. nop nop nop nop nop nop nop nop nop nop nop nop nop nop nop nop nop nop nop nop nop nop nop nop nop nop nop nop nop nop nop nop nop nop nop nop nop nop nop nop nop nop nop nop nop nop nop nop nop nop nop nop nop nop nop nop nop nop nop nop nop nop nop nop nop nop nop nop nop nop nop nop nop nop nop nop nop nop nop nop nop nop nop nop nop nop nop nop nop nop nop nop nop nop nop nop nop nop nop nop nop nop nop nop nop nop nop sub r7, r7, #1 ; Decrement the loop counter. cbz r7, led_strip_asm_end ; If we have sent 24 bits, go to the end. b send_led_strip_bit ; Otherwise, go back and send another bit. led_strip_asm_end pop {r12, r7} bx lr END