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pranav083/P8_12.P

Last active June 30, 2019 14:55
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INPUT AT P8_16 PIN
Raw
device_tree.dts
/dts-v1/;
/plugin/;
/ {
compatible = "ti,beaglebone", "ti,beaglebone-black", "ti,beaglebone-green";
// identification
part-number = "PRU-GPIO-EXAMPLE2";
version = "00A0";
// resources
exclusive-use =
"P8.11",
"P8.12",
"P8.13",
"P8.15",
"P8.16",
// "P8.20",
// "P8.21",
// "P9.27",
"pru0";
// "P9.12",
// "P9.24",
// "pru1";
// pinmux
fragment@0 {
target = <&am33xx_pinmux>;
__overlay__ {
pinctrl_test: PRU-GPIO-EXAMPLE2-pins{
pinctrl-single,pins= <
0x018 0x07 /* p8_6 38 gpio1_6 op pd mode7 */
0x01c 0x27 /* p8_7 39 gpio1_7 in pd mode7 */
0x034 0x07 /* p8_11 45 gpio1_13 in pd mode7 */
0x030 0x07 /* p8_12 44 gpio1_12 op pd mode6 */
0x024 0x27 /* p8_13 23 gpio0_23 op pd mode6 */
0x03c 0x47 /* p8_15 47 gpio1_15 op pd mode7 */
0x038 0x27 /* p8_16 46 gpio1_14 in pd mode6 */
/* 0x084 0x05 /* p8_20 63 gpio1_31 in pd mode5 */
/* 0x080 0x05 /* p8_21 62 gpio1_30 in pd mode5 */
/* 0x078 0x0f /* p9_12 60 gpio1_13 op none mode7 */
/* 0x184 0x27 /* p9_24 15 gpio1_28 in pd mode7 */
/* 0x1a4 0x25 /* p9_27 115 gpio3_19 in pd mode5 */
/* OUTPUT GPIO(mode7) 0x07 pulldown, 0x17 pullup, 0x?f no pullup/down */
/* INPUT GPIO(mode7) 0x27 pulldown, 0x37 pullup, 0x?f no pullup/down */
>;
};
};
};
//----- PRU
fragment@1 {
target = <&ocp>;
__overlay__ {
test_helper: helper {
compatible = "bone-pinmux-helper";
status = "okay";
pinctrl-names = "default", "gpio";
pinctrl-0 = <&pinctrl_test>;
};
};
};
fragment@2 {
target = <&pruss>;
__overlay__ {
status = "okay";
};
};
};
Raw
P8_12.P
.origin 0
.entrypoint START
#define GPIO0 0x44E07000
#define GPIO1 0x4804C000
#define GPIO2 0x481AC000
#define GPIO3 0x481AE000
#define GPIO_OE 0x134
#define GPIO_DATAIN 0x138
#define GPIO_CLEARDATAOUT 0x190
#define GPIO_SETDATAOUT 0x194
#define INS_PER_MS 200 * 1000
#define ON_DURATION 250 * INS_PER_MS
#define OFF_DURATION 250 * INS_PER_MS
// set up a value that has a 1 in bit 24. We will later use this to toggle the state of LED3
#define GPIO1_LED3BIT 1<<24
#define BUTTON 14 /* P8_16 46 GPIO 1_14 mode 7 */
#define BULB 12 /* P8_12 44 GPIO 1_12 mode 7 */
#define CPRUCFG c4
// this label is where the code execution starts
START:
// Enable the OCP master port,
lbco r0, CPRUCFG, 4, 4 // read SYSCFG
clr r0.t4 // clear SYSCFG[STANDBY_INIT]
sbco r0, CPRUCFG, 4, 4 // enable OCP master port;
//set OUT pin to ouput
MOV r3, GPIO1 | GPIO_OE
LBBO r2, r3, 0, 4
CLR r2, r2, 12 // setting as a output pin
SBBO r2, r3, 0, 4
//set OUT pin to ouput
MOV r3, GPIO1 | GPIO_OE
LBBO r2, r3, 0, 4
SET r2, r2, 14 // setting as a output pin
SBBO r2, r3, 0, 4
//set IN pin to INPUT
MOV r3, GPIO1 | GPIO_DATAIN
LBBO r2, r3, 0, 4
//setting the register for data high and low for GPIO0
MOV r5, GPIO1 | GPIO_SETDATAOUT
MOV r4, GPIO1 | GPIO_CLEARDATAOUT
L1:
//set IN pin to INPUT
MOV r3, GPIO1 | GPIO_DATAIN
LBBO r2, r3, 0, 4
// Now monitor the state of R31 bit 14, this corresponds to header 8 pin 16
QBBS LED_HIGH, r2.t14 // if the bit is high, jump to LED_HIGH
QBBC LED_LOW, r2.t14 // if the bit is low, jump to LED_LOW
JMP L1 // we should never get here unless the bit
// changes between tests
LED_HIGH:
//Setting the value for the out pin
MOV r2, 1 << 12 //move out pin to
SBBO r2, r4, 0, 4 // the p8_12 pin is low
JMP L1 // test again
LED_LOW:
//Setting the value for the out pin
MOV r2, 1 << 12 //move out pin to
SBBO r2, r5, 0, 4 // the p8_12 pin is HIGH
JMP L1 // test again
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