/*JSON{
"type" : "method",
"class" : "SPI",
"name" : "write",
"generate" : "jswrap_spi_write",
"params" : [
["data","JsVarArray",["One or more items to write. May be ints, strings, arrays, or objects of the form `{data: ..., count:#}`.","If the last argument is a pin, it is taken to be the NSS pin"]]
]
}
Write a character or array of characters to SPI - without reading the result back.
For maximum speeds, please pass either Strings or Typed Arrays as arguments.
*/
void jswrap_spi_write(JsVar *parent, JsVar *args) {
NOT_USED(parent);
IOEventFlags device = jsiGetDeviceFromClass(parent);
spi_sender spiSend;
spi_sender_data spiSendData;
if (!jsspiGetSendFunction(parent, &spiSend, &spiSendData))
return;
Pin nss_pin = PIN_UNDEFINED;
// If the last value is a pin, use it as the NSS pin
JsVarInt len = jsvGetArrayLength(args);
if (len>0) {
JsVar *last = jsvGetArrayItem(args, len-1); // look at the last value
if (jsvIsPin(last)) {
nss_pin = jshGetPinFromVar(last);
jsvUnLock(jsvArrayPop(args));
}
jsvUnLock(last);
}
// we're only sending (no receive)
if (DEVICE_IS_SPI(device)) jshSPISetReceive(device, false);
// assert NSS
if (nss_pin!=PIN_UNDEFINED) jshPinOutput(nss_pin, false);
// Write data
jsvIterateCallback(args, (void (*)(int, void *))spiSend, &spiSendData);
// Wait until SPI send is finished, and flush data
if (DEVICE_IS_SPI(device))
jshSPIWait(device);
// de-assert NSS
if (nss_pin!=PIN_UNDEFINED) jshPinOutput(nss_pin, true);
}
/*JSON{
"type" : "constructor",
"class" : "Pin",
"name" : "Pin",
"generate" : "jswrap_pin_constructor",
"params" : [
["value", "JsVar", "A value to be converted to a pin. Can be a number, pin, or String."]
],
"return" : ["JsVar","A Pin object"]
}
Creates a pin from the given argument (or returns undefined if no argument)
*/
JsVar *jswrap_pin_constructor(JsVar *val) {
Pin pin = jshGetPinFromVar(val);
if (!jshIsPinValid(pin)) return 0;
#ifdef ESP8266
if (jsvIsInt(val) && !jsvIsPin(val))
jsWarn("The Pin() constructor is deprecated. Please use `D%d`, or NodeMCU.Dx instead", pin);
#endif
return jsvNewFromPin(pin);
}
