Other Parts Discussed in Thread: CC8520
I have difficulties getting the CC debugger to see the CC8520 chip that I'm using.Some simpler thing work OK, and other things are not possible.
- When connecting it and pushing the reset button on the CC debugger it will change from red to green, and in Wireless Commander it will also tell the CC8520 device ID of the chip.
- When programming it will tell that it succeeded
- When I try to read the chip info or device info it will display an error message. (Communication failure: check hardware and connection). Also the RX/TX test is not possible.
- When I look in the Command and monitoring window of Wireless Commander, it will display only zeroes in the answers of the device.
This leads me to think of a hardware error somewhere in my board (I have two board assembled). I double checked the solderings, and even replaced one CC8520 module but it isn't getting better.
I checked the clock and it is running nicely at 48.000 MHz. Voltage is 3v3 with approx 10x 100nF next to it to buffer.
The connections to the CC debugger are as following:
| 1 | GND | |
| 2 | +3v3 | |
| 3 | n.c. | (other design have GPIO1 connected? Is this needed?) |
| 4 | n.c. | |
| 5 | CSN | |
| 6 | SCLK | |
| 7 | RSTN | 2k7 pullup + 10nf to gnd (also fed to MCU, but is threated as an input) |
| 8 | MOSI | |
| 9 | GIO9 | (Also tried to disconnect. No change) |
| 10 | MISO |
Length of the traces on board is approx 5cm. Using another debugger makes no change.
Can you help me to determine where the problem is? I would need to use the wireless commander with the standard test (slave) program, to test it. Later I will put my own configuration in the chip.
Best regards,
Elmar