def spi_send_dma(self, data):
self.trans.length = len(
data) * 8 # Length is in bytes, transaction length is in bits.
self.trans.tx_buffer = data # data should be allocated as DMA-able memory
self.trans.user = self.spi_callbacks
#esp.spi_device_transmit(self.spi, self.trans)
esp.spi_device_queue_trans(self.spi, self.trans, -1)
def disp_spi_send(self, data):
if len(data) == 0: return # no need to send anything
self.trans.length = len(
data) * 8 # Length is in bytes, transaction length is in bits.
self.trans.tx_buffer = data
esp.spi_device_queue_trans(self.spi, self.trans, -1)
esp.spi_device_get_trans_result(self.spi, self.trans_res, -1)
def disp_spi_send(self, data, dma=False):
if len(data) == 0: return # no need to send anything
self.trans.length = len(
data) * 8 # Length is in bytes, transaction length is in bits.
self.trans.tx_buffer = data
if dma:
self.trans.user = self.spi_callbacks
esp.spi_device_queue_trans(self.spi, self.trans, -1)
else:
self.trans.user = None
esp.spi_device_polling_transmit(self.spi, self.trans)
def xpt_cmds(self, cmds):
cmd_count = int(len(cmds))
for i in range(0, cmd_count):
self.trans[i].cmd = cmds[i]
esp.spi_device_queue_trans(self.spi, self.trans[i], -1)
result = []
for i in range(0, cmd_count):
esp.spi_device_get_trans_result(self.spi, self.trans_result_ptr,
-1)
buf = self.trans[i].rx_buffer.__dereference__(2)
value = (int(buf[0]) << 4) + (int(
buf[1]) >> 4) # value is in the 12 higher bits, network order
if value == int(self.MAX_RAW_COORD):
value = 0
result.append(value)
return tuple(result)