Content # Python version of https://github.com/badgeteam/mch2022-firmware-ice40/blob/master/projects/selftest/fw/led.c import mch22 from fpga_wishbone import FPGAWB def op_split(path): if path == "": return ("", "") r = path.rsplit("/", 1) if len(r) == 1: return ("", path) head = r[0] if not head: head = "/" return (head, r[1]) class FPGALED: def __init__(self): # load bitstream from SD card onto the FPGA with open(op_split(__file__)[0] + "/spi_skeleton.bin", "rb") as f: mch22.fpga_load(f.read()) # create a wishbone command buffer self.c = FPGAWB() # LEDPWRR self.write(0x11, 0x00) # LEDPWRG self.write(0x12, 0x00) # LEDPWRB self.write(0x13, 0x00) # LEDDBCRR self.write(0x15, 0x00) # LEDDBCFR self.write(0x16, 0x00) # LEDDONR self.write(0x1A, 0x00) # LEDDOFR self.write(0x1B, 0x00) # LEDDBR self.write(0x19, 0xE0) # LEDDCR0 self.write(0x18, 0x5D) # CSR self.write(0x00, 0x0E) self.exec() def write(self, address, data): self.c.queue_write(0, address << 2, data) def exec(self): self.c.exec() # create a new wisbone object after executing the previous one self.c = FPGAWB() def led_color(self, r, g, b): # r and g swapped on mch2022 badge # LEDPWRR self.write(0x11, g) # LEDPWRG self.write(0x12, r) # LEDPWRB self.write(0x13, b) def led_state(self, on): # LEDDCR0 if (on): self.write(0x18, 0xDD) else: self.write(0x18, 0x5D) def led_blink(self, enabled, on_time_ms, off_time_ms): # Disable EXE before doing any change */ # LED_CSR_RGBLEDEN | LED_CSR_CURREN; self.write(0x00, 0x0C) # Load new config if (enabled): # LEDDONR self.write(0x1A, (on_time_ms >> 5) & 0xFF) # LEDDOFR self.write(0x1B, (off_time_ms >> 5) & 0xFF) else: # LEDDONR self.write(0x1A, 0) # LEDDOFR self.write(0x1B, 0) # Re-enable execution */ # LED_CSR_LEDDEXE | LED_CSR_RGBLEDEN | LED_CSR_CURREN; self.write(0x00, 0x0E) def led_breathe(self, enabled, rise_time_ms, fall_time_ms): if (enabled): #led_regs->ip.bcrr = LEDDA_IP_BREATHE_ENABLE | LEDDA_IP_BREATHE_MODULATE | LEDDA_IP_BREATHE_TIME_MS(rise_time_ms); self.write(0x15, 0xA0 | ((rise_time_ms >> 7) & 0x0f)) #led_regs->ip.bcfr = LEDDA_IP_BREATHE_ENABLE | LEDDA_IP_BREATHE_MODULATE | LEDDA_IP_BREATHE_TIME_MS(fall_time_ms); self.write(0x16, 0xA0 | ((fall_time_ms >> 7) & 0x0f)) else: self.write(0x15, 0) self.write(0x16, 0)