mrumel/TCAN4550-py
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Continue work on TCAN driver

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This commit is contained in:
Merrick Rumel 2022-06-28 11:00:37 -04:00
parent 5776b07481
commit ff5c05c25e
1 changed files with 19 additions and 10 deletions
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29
src/TCAN4550-py/tcan4550.py
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@ -609,7 +609,9 @@ class TCAN4550:
# Reserved 0x80-00
REG_BITS_DEVICE_IE_MASK =0x7F69D700 #! This mask is the bitwise-inverse of the 0x0830 IE register's reserved bits. A reserved bit is read as high always. This masks the reserved bits out.
def __init__(self, bus: int, device: int) -> None:
def __init__(self, bus: int, device: int, verify_writes: bool) -> None:
# Verify Writes veriable
self.TCAN4x5x_DEVICE_VERIFY_CONFIGURATION_WRITES = verify_writes
# SPI initialization
self.spi = spidev.SpiDev(bus, device)
self.spi.max_speed_hz = 2000000
@ -628,8 +630,7 @@ class TCAN4550:
self.dev_ir = TCAN4x5x_Device_Interrupts()
self.dev_ir.word = 0x0 # Setup a new MCAN IR object for easy interrupt checking
self.TCAN_read_interrupts(
self.dev_ir) # Request that the struct be updated with current DEVICE (not MCAN) interrupt values
dev_ir = self.TCAN4x5x_Device_ReadInterrupts() # Request that the struct be updated with current DEVICE (not MCAN) interrupt values
if self.dev_ir.b.PWRON:
self.TCAN4x5x_Device_ClearInterrupts(self.dev_ir)
@ -746,24 +747,32 @@ class TCAN4550:
self.TCAN4x5x_MCAN_ClearInterruptsAll() # Resets all MCAN interrupts (does NOT include any SPIERR interrupts)
def TCAN4x5x_Device_ClearInterrupts(self, ir):
self.TCAN_write_32(REG_DEV_IR, ir.word)
self.AHB_WRITE_32(TCAN4550.REG_DEV_IR, ir.word)
def TCAN_clearSPIerr(self) -> None:
pass
self.AHB_WRITE_32(TCAN4550.REG_SPI_STATUS, 0xFFFFFFFF)
def TCAN_configure_interrupt_enable(self, ie) -> bool:
def TCAN4x5x_Device_ConfigureInterruptEnable(self, ie) -> bool:
self.AHB_WRITE_32(TCAN4550.REG_DEV_IE, ie.word);
if self.TCAN4x5x_DEVICE_VERIFY_CONFIGURATION_WRITES:
# Check to see if the write was successful.
readValue = self.AHB_READ_32(TCAN4550.REG_DEV_IE) # Read value
readValue = readValue & TCAN4550.REG_BITS_DEVICE_IE_MASK # Apply mask to ignore reserved
if readValue != (ie.word & TCAN4550.REG_BITS_DEVICE_IE_MASK):
return False
return True
def TCAN_read_interrupts(self, ir) -> bool:
return True
def TCAN4x5x_Device_ReadInterrupts(self):
ir = TCAN4x5x_Device_Interrupts()
ir.word = self.AHB_READ_32(TCAN4550.REG_DEV_IR)
def TCAN_write_32(self, address, data) -> None:
def AHB_WRITE_32(self, address, data) -> None:
pass
def TCAN_write(self, data, address, no_words) -> None:
pass
def TCAN_read_32(self, address, data) -> uint32_t:
def AHB_READ_32(self, address, data) -> uint32_t:
return uint32_t(0)
def TCAN_read(self, address, data, no_words) -> uint32_t: