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Bus Pirate Support / Re: I2C, no ACK at random times
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I am read slow this link
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Bus Pirate Support / Re: I2C, no ACK at random times
I am writing and reading are correct but it always finishes with NACK
Vcc =5V
VPU=5V
Bus Pirate v2go
http://dangerousprototypes.com
Firmware v2.2
DEVID:0x0447 REVID:0x3043 (B5)
1. HiZ
2. 1-WIRE
3. UART
4. I2C
5. SPI
6. JTAG
7. RAW2WIRE
8. RAW3WIRE
9. PC KEYBOARD
10. MIDI
11. LCD
(1) >4
Modalidad seleccionada
Modo I2C:
1. Software
2. Hardware
(1) >1
Elegir velocidad:
1. Baja(~5KHz)
2. Alta(~50KHz)
(1) >2
LISTO
I2C>W
ALIMENTACIÓN ENCENDIDA
I2C>P
1. Pull-ups activadas
2. Pull-ups desactivadas
(1) >1
Activar resistencias Pull-up
I2C>I
Bus Pirate v2go
http://dangerousprototypes.com
Firmware v2.2
DEVID:0x0447 REVID:0x3043 (B5)
*----------*
ALIMENTACIÓN ENCENDIDA
Sensores de tensión: 5V: 4.9 | 3.3V: 3.2 | VPULLUP: 4.9 |
a/A/@ controla pin AUX
Salidas en drenador abierto (H=entrada, L=GND)
Activar resistencias Pull-up
Configuración de orden de bits no permitida
*----------*
I2C>(1)
Buscando direcciones I2C de 7bit.
Encontrados dispositivos en la dirección:
0xA0(0x50 W) 0xA1(0x50 R) 0xA2(0x51 W) 0xA3(0x51 R) 0xA4(0x52 W) 0xA5(0x52 R) 0xA6(0x53 W) 0xA7(0x53 R) 0xA8(0x54 W) 0xA9(0x54 R) 0xAA(0x55 W) 0xAB(0x55 R) 0xAC(0x56 W) 0xAD(0x56 R) 0xAE(0x57 W) 0xAF(0x57 R)
I2C>{0xa0 0 0}
BIT DE START I2C
ESCRITURA: 0xA0 ACK
ESCRITURA: 0x00 ACK
ESCRITURA: 0x00 ACK
BIT DE STOP I2C
I2C>{0xa1 r}
BIT DE START I2C
ESCRITURA: 0xA1 ACK
LECTURA: 0x01 NACK
BIT DE STOP I2C
or
I2C>{0xa1 r:5}
BIT DE START I2C
ESCRITURA: 0xA1 ACK
LECTURA 0x05 BYTES:
0x01 ACK 0x02 ACK 0x03 ACK 0x04 ACK 0x61 NACK
BIT DE STOP I2C
to end NACK?
failure : Hardware and software, low speed (5k,50k and 100k)